v7.0.1 Usage Question: reserved word mapping with custom templates

Description

I have a set of custom templates for generating rust code.
It is based of v5.4 rust / request client templates.

Generating code with openapi definition with properties like 'type' works with
the standard v7.0.1 generation, but not with my custom template.
I have a configuration file with all kinds of options set.
Like

# java -jar openapi-generator-cli-5.4.0.jar generate -c d42/OpenAPI_Gen.yml --skip-validate-spec > d42\Generated.out
#  --global-propery apiDocs=false,apiTests=true,modelDocs=false,modelTests=true
generatorName: rust
outputDir: d42
library: reqwest
#direct 
inputSpec: d42/device42.yaml
#inputSpec: d42\spec2.json
templateDir: ../openapi_templates5/
skipFormModel: false
apiDocs: false
apiTests: true
modelDocs: false
modelTests: true
#reserved-words-mappings: type=r#type
files: # https://openapi-generator.tech/docs/customization/
  impl/api_impl.mustache:
    templateType: API
    folder: src/api_impl
    destinationFilename: _impl.rs_
  impl/model_impl.mustache:
    templateType: Model
    folder: src/model_impl
    destinationFilename: _impl.rs_
  impl/errors_impl.mustache:
    templateType: SupportingFiles
    folder: src/model_impl
    destinationFilename: errors_impl.rs_
  impl/api_mod_impl.mustache:
    destinationFilename: mod.rs_
    templateType: SupportingFiles
    folder: src/api_impl
  impl/model_mod_impl.mustache:
    destinationFilename: mod.rs_
    templateType: SupportingFiles
    folder: src/model_impl
  impl/warp_impl.mustache:
    destinationFilename: warp_impl.rs_
    templateType: SupportingFiles
    folder: src
  impl/sensor_impl.mustache:
    destinationFilename: sensor_impl.rs_
    templateType: SupportingFiles
    folder: src
  impl/build.mustache:
    destinationFilename: build.rs_
    templateType: SupportingFiles
  impl/main_impl.mustache:
    destinationFilename: src/main.rs_
    templateType: SupportingFiles
additionalProperties:
  vendorExtensions.x-outputDir: d42
  httpUserAgent: prtgclib_rust
  vendorExtensions.x-gen-exe: prtgc_d42
  supportAsync: true
  supportMultipleResponses: true
  packageName: prtgclib_d42api
  packageVersion: 0.2.33
  vendorExtensions.x-moahclient: true

Exception in thread "main" java.lang.RuntimeException: Could not generate model 'device'
        at org.openapitools.codegen.DefaultGenerator.generateModels(DefaultGenerator.java:583)
        at org.openapitools.codegen.DefaultGenerator.generate(DefaultGenerator.java:960)
        at org.openapitools.codegen.cmd.Generate.execute(Generate.java:511)
        at org.openapitools.codegen.cmd.OpenApiGeneratorCommand.run(OpenApiGeneratorCommand.java:32)
        at org.openapitools.codegen.OpenAPIGenerator.main(OpenAPIGenerator.java:66)
Caused by: java.lang.RuntimeException: reserved word type not allowed

How to I force the generator to use the standard rust reserved word substitution?

openapi-generator version

v 7.0.1

OpenAPI declaration file content or url

https://api.device42.com/device42.yaml

Command line used for generation

java -jar ../openapi-generator-cli-7.0.1.jar generate -c d42/OpenAPI_Gen.yml --skip-validate-spec > d42\Generated.out

Related issues/PRs

https://github.com/OpenAPITools/openapi-generator/pull/16103

Start with org.openapitools.codegen.DefaultGenerator.generateModels and compare the standard Rust templates with the custom files under ../openapi_templates5/. Reproduce generation using the supplied OpenAPI_Gen.yml and device42.yaml, then verify that a property named type is handled successfully with the custom templates.