M1.9.* to M2.4 Notice: Undefined offset: 19

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Hi, I would like migrate Magento 1.9.3 to Magento 2.4.0 and I managed without problems with 2 recent ecommerce with the same version. With this multilingual ecommerce which has been updated from version 1.4. * up to now I am having problems.

I follow the correct procedure to migrate, as I did for the other sites, I don't make changes to files to ignore tables or attributes but I get this:
`sudo php bin/magento migrate:data -a -vvv vendor/magento/data-migration-tool/etc/opensource-to-opensource/1.9.3.0/config.xml

[2020-10-20 15:36:11][INFO][mode: data][stage: integrity check][step: Data Integrity Step]: started
[2020-10-20 15:36:11][INFO][mode: data][stage: integrity check][step: EAV Step]: started
100% [============================] Remaining Time: < 1 sec
[2020-10-20 15:36:11][WARNING]: Incompatibility in data. Source document: eav_attribute. Field: frontend_input. Error: Attribute with attribute_id=1038 cannot contain empty field value
[2020-10-20 15:36:11][WARNING]: Incompatibility in data. Source document: eav_attribute. Field: source_model. Error: Class metarobots/product_attribute_source_unit is not mapped in record attribute_id=1001
[2020-10-20 15:36:11][INFO][mode: data][stage: integrity check][step: Customer Attributes Step]: started
[2020-10-20 15:36:11][INFO][mode: data][stage: integrity check][step: Map Step]: started
100% [============================] Remaining Time: < 1 sec
[2020-10-20 15:36:14][WARNING]: Source documents are not mapped: am_acart_attribute,am_acart_blacklist,am_acart_canceled,am_acart_history,am_acart_quote2email,am_acart_rules,am_acart_schedule,apptrian_imageoptimizer_files,aw_blog,aw_blog_cat,aw_blog_cat_store,aw_blog_comment,aw_blog_post_cat,aw_blog_store,aw_blog_tags,belvg_facebook_customer,belvg_twitter_customer,buyshoparallax,buyshopflex,buyshoprevolution,deal_deal,deal_deal_product,deal_deal_store,ess__backup_v5_config,m2epro__backup_v5_amazon_account,m2epro__backup_v5_amazon_listing,m2epro__backup_v5_amazon_listing_product,m2epro__backup_v5_amazon_template_description,m2epro__backup_v5_amazon_template_general,m2epro__backup_v5_amazon_template_selling_format,m2epro__backup_v5_amazon_template_synchronization,m2epro__backup_v5_attribute_set,m2epro__backup_v5_buy_listing,m2epro__backup_v5_buy_listing_product,m2epro__backup_v5_buy_template_description,m2epro__backup_v5_buy_template_general,m2epro__backup_v5_buy_template_selling_format,m2epro__backup_v5_buy_template_synchronization,m2epro__backup_v5_config,m2epro__backup_v5_ebay_account_store_category,m2epro__backup_v5_ebay_listing,m2epro__backup_v5_ebay_listing_product,m2epro__backup_v5_ebay_listing_product_variation,m2epro__backup_v5_ebay_marketplace,m2epro__backup_v5_ebay_message,m2epro__backup_v5_ebay_template_description,m2epro__backup_v5_ebay_template_general,m2epro__backup_v5_ebay_template_general_calculated_shipping,m2epro__backup_v5_ebay_template_general_payment,m2epro__backup_v5_ebay_template_general_shipping,m2epro__backup_v5_ebay_template_general_specific,m2epro__backup_v5_ebay_template_selling_format,m2epro__backup_v5_ebay_template_synchronization,m2epro__backup_v5_listing,m2epro__backup_v5_listing_category,m2epro__backup_v5_listing_product,m2epro__backup_v5_listing_product_variation,m2epro__backup_v5_play_listing,m2epro__backup_v5_play_listing_product,m2epro__backup_v5_play_template_description,m2epro__backup_v5_play_template_general,m2epro__backup_v5_play_template_selling_format,m2epro__backup_v5_play_template_synchronization,m2epro__backup_v5_template_description,m2epro__backup_v5_template_general,m2epro__backup_v5_template_selling_format,m2epro__backup_v5_template_synchronization,m2epro__backup_v5_translation_custom_suggestion,m2epro__backup_v5_translation_language,m2epro__backup_v5_translation_text,m2epro__backup_v608_ebay_template_shipping,m2epro__backup_v611_ebay_order,m2epro__backup_v611_ebay_order_item,m2epro_account,m2epro_amazon_account,m2epro_amazon_dictionary_category,m2epro_amazon_dictionary_category_product_data,m2epro_amazon_dictionary_marketplace,m2epro_amazon_dictionary_shipping_override,m2epro_amazon_dictionary_specific,m2epro_amazon_item,m2epro_amazon_listing,m2epro_amazon_listing_auto_category_group,m2epro_amazon_listing_other,m2epro_amazon_listing_product,m2epro_amazon_listing_product_variation,m2epro_amazon_listing_product_variation_option,m2epro_amazon_marketplace,m2epro_amazon_order,m2epro_amazon_order_item,m2epro_amazon_processed_inventory,m2epro_amazon_template_description,m2epro_amazon_template_description_definition,m2epro_amazon_template_description_specific,m2epro_amazon_template_selling_format,m2epro_amazon_template_shipping_override,m2epro_amazon_template_shipping_override_service,m2epro_amazon_template_synchronization,m2epro_buy_account,m2epro_buy_dictionary_category,m2epro_buy_item,m2epro_buy_listing,m2epro_buy_listing_auto_category_group,m2epro_buy_listing_other,m2epro_buy_listing_product,m2epro_buy_listing_product_variation,m2epro_buy_listing_product_variation_option,m2epro_buy_marketplace,m2epro_buy_order,m2epro_buy_order_item,m2epro_buy_template_new_product,m2epro_buy_template_new_product_attribute,m2epro_buy_template_new_product_core,m2epro_buy_template_selling_format,m2epro_buy_template_synchronization,m2epro_cache_config,m2epro_config,m2epro_ebay_account,m2epro_ebay_account_store_category,m2epro_ebay_dictionary_category,m2epro_ebay_dictionary_marketplace,m2epro_ebay_dictionary_motor_ktype,m2epro_ebay_dictionary_motor_specific,m2epro_ebay_dictionary_shipping,m2epro_ebay_feedback,m2epro_ebay_feedback_template,m2epro_ebay_item,m2epro_ebay_listing,m2epro_ebay_listing_auto_category_group,m2epro_ebay_listing_other,m2epro_ebay_listing_product,m2epro_ebay_listing_product_variation,m2epro_ebay_listing_product_variation_option,m2epro_ebay_marketplace,m2epro_ebay_order,m2epro_ebay_order_external_transaction,m2epro_ebay_order_item,m2epro_ebay_template_category,m2epro_ebay_template_category_specific,m2epro_ebay_template_description,m2epro_ebay_template_other_category,m2epro_ebay_template_payment,m2epro_ebay_template_payment_service,m2epro_ebay_template_return,m2epro_ebay_template_selling_format,m2epro_ebay_template_shipping,m2epro_ebay_template_shipping_calculated,m2epro_ebay_template_shipping_service,m2epro_ebay_template_synchronization,m2epro_listing,m2epro_listing_auto_category,m2epro_listing_auto_category_group,m2epro_listing_log,m2epro_listing_other,m2epro_listing_other_log,m2epro_listing_product,m2epro_listing_product_variation,m2epro_listing_product_variation_option,m2epro_lock_item,m2epro_locked_object,m2epro_marketplace,m2epro_migration_v6,m2epro_operation_history,m2epro_order,m2epro_order_change,m2epro_order_item,m2epro_order_log,m2epro_order_matching,m2epro_primary_config,m2epro_processing_request,m2epro_product_change,m2epro_registry,m2epro_stop_queue,m2epro_synchronization_config,m2epro_synchronization_log,m2epro_system_log,m2epro_template_description,m2epro_template_selling_format,m2epro_template_synchronization,m2epro_wizard,magemonkey_api_debug,magemonkey_async_orders,magemonkey_async_subscribers,magemonkey_bulksync_export,magemonkey_bulksync_import,magemonkey_ecommerce360,magemonkey_last_order,magemonkey_mails_sent,paypalauth_customer,plumbase_product,plumrocket_sociallogin_account,recaptcha,rewardpoints_account,rewardpoints_catalogrules,rewardpoints_flat_account,rewardpoints_pointrules,rewardpoints_referral,rewardpoints_referralrules,rewardpoints_rule,sfc_googleauthor,simplegoogleshopping,sm_cameraslide_slide,sm_cameraslide_sliders,sm_dynamic_animation,sm_dynamic_css,sm_dynamic_sliders,sm_dynamic_slides,sm_menu_groups,sm_menu_items,sm_shopby_attribute_url_key,smtppro_email_log,tiny_compressimages_image,tiny_compressimages_totals,watchlog,wordpress_association,wordpress_association_type
[2020-10-20 15:36:14][WARNING]: Destination documents are not mapped: gift_message
[2020-10-20 15:36:14][WARNING]: Source fields are not mapped. Document: cms_page. Fields: google_author_id,meta_robots
[2020-10-20 15:36:14][WARNING]: Source fields are not mapped. Document: newsletter_subscriber. Fields: subscriber_firstname,subscriber_lastname
[2020-10-20 15:36:14][WARNING]: Source fields are not mapped. Document: sales_flat_creditmemo. Fields: cod_fee,base_cod_fee,cod_tax_amount,base_cod_tax_amount
[2020-10-20 15:36:14][WARNING]: Source fields are not mapped. Document: sales_flat_invoice. Fields: cod_fee,base_cod_fee,cod_tax_amount,base_cod_tax_amount,rewardpoints_gathered,rewardpoints_description,rewardpoints_quantity,base_rewardpoints,rewardpoints,rewardpoints_referrer,rewardpoints_cart_rule_text
[2020-10-20 15:36:14][WARNING]: Source fields are not mapped. Document: sales_flat_order. Fields: cod_fee,base_cod_fee,cod_fee_invoiced,base_cod_fee_invoiced,cod_tax_amount,base_cod_tax_amount,cod_tax_amount_invoiced,base_cod_tax_amount_invoiced,cod_fee_refunded,base_cod_fee_refunded,cod_tax_amount_refunded,base_cod_tax_amount_refunded,cod_fee_canceled,base_cod_fee_canceled,cod_tax_amount_canceled,base_cod_tax_amount_canceled,ebizmarts_abandonedcart_flag,ebizmarts_magemonkey_campaign_id,rewardpoints_description,rewardpoints_quantity,base_rewardpoints,rewardpoints,rewardpoints_referrer,rewardpoints_gathered,rewardpoints_cart_rule_text
[2020-10-20 15:36:14][WARNING]: Source fields are not mapped. Document: sales_flat_order_item. Fields: rewardpoints_gathered,rewardpoints_used,rewardpoints_catalog_rule_text,rewardpoints_gathered_float,discount_before_rewards,base_discount_before_rewards
[2020-10-20 15:36:14][WARNING]: Source fields are not mapped. Document: sales_flat_quote. Fields: cod_fee,base_cod_fee,cod_tax_amount,base_cod_tax_amount,ebizmarts_abandonedcart_counter,ebizmarts_abandonedcart_flag,ebizmarts_abandonedcart_token,rewardpoints_description,rewardpoints_quantity,base_rewardpoints,rewardpoints,rewardpoints_referrer,rewardpoints_gathered,rewardpoints_cart_rule_text
[2020-10-20 15:36:14][WARNING]: Source fields are not mapped. Document: sales_flat_quote_address. Fields: cod_fee,base_cod_fee,cod_tax_amount,base_cod_tax_amount
[2020-10-20 15:36:14][WARNING]: Source fields are not mapped. Document: sales_flat_quote_item. Fields: rewardpoints_gathered,rewardpoints_used,rewardpoints_catalog_rule_text,rewardpoints_gathered_float,discount_before_rewards,base_discount_before_rewards
[2020-10-20 15:36:14][INFO][mode: data][stage: integrity check][step: Url Rewrite Step]: started
[2020-10-20 15:36:14][INFO][mode: data][stage: integrity check][step: Log Step]: started
[2020-10-20 15:36:14][INFO][mode: data][stage: integrity check][step: Ratings Step]: started
[2020-10-20 15:36:14][INFO][mode: data][stage: integrity check][step: ConfigurablePrices step]: started
[2020-10-20 15:36:14][INFO][mode: data][stage: integrity check][step: OrderGrids Step]: started
[2020-10-20 15:36:14][INFO][mode: data][stage: integrity check][step: Tier Price Step]: started
[2020-10-20 15:36:14][INFO][mode: data][stage: integrity check][step: SalesIncrement Step]: started
[2020-10-20 15:36:14][INFO][mode: data][stage: integrity check][step: Inventory Step]: started
[2020-10-20 15:36:14][INFO][mode: data][stage: setup triggers][step: Stage]: started
[2020-10-20 15:36:14][INFO][mode: data][stage: data migration][step: EAV Step]: started
71% [====================>-------] Remaining Time: < 1 sec
In ErrorHandler.php line 61:

[Exception]
Notice: Undefined offset: 19 in vendor/magento/data-migration-tool/src/Migration/Step/Eav/Data.php on line 446
`
after this error, in this period, I tried to completely
1) delete the external modules;
2) delete the tables of the deletes module;

but the modifications of these modules to the original tables remained, such as rewardpoints, googleauthor ...

Thanks

@magento I am working on this

Start by reproducing the reported command, `sudo php bin/magento migrate:data -a -vvv vendor/magento/data-migration-tool/etc/opensource-to-opensource/1.9.3.0/config.xml`, and inspect `vendor/magento/data-migration-tool/src/Migration/Step/Eav/Data.php` around line 446. Use the EAV migration step and the reported `Undefined offset: 19` as the failure boundary; done means the migration no longer stops at this error.

Written by the indexing model from the issue text.