Retain repo version is not encouraged in Pulp Replica servers

Version
pulpcore == 3.73.1
pulp_rpm == 3.29.0

Describe the bug
In the master upstream pulp server the retain repo version is set to 1/some value for many of the repositories. The retainr epo versions is not set in the replica server, hence all versions are maintained in the pulp replica server.

To Reproduce
Pulp replication from upstream pulp server.

Expected behavior
Replicate the repository versions from the upstream pulp server to the replica server also.

Additional context
Retain repo version is set to 1 in upstream pulp server.
{ "pulp_href": "/pulp/api/v3/repositories/rpm/rpm/018deee6-c05e-74d4-a768-ae6aa12c1186/", "prn": "prn:rpm.rpmrepository:018deee6-c05e-74d4-a768-ae6aa12c1186", "pulp_created": "2024-02-28T08:48:36.449454Z", "pulp_last_updated": "2025-10-14T18:51:35.875569Z", "versions_href": "/pulp/api/v3/repositories/rpm/rpm/018deee6-c05e-74d4-a768-ae6aa12c1186/versions/", "pulp_labels": {}, "latest_version_href": "/pulp/api/v3/repositories/rpm/rpm/018deee6-c05e-74d4-a768-ae6aa12c1186/versions/265/", "name": "source_lrh8_baseos_x86_64", "description": null, "retain_repo_versions": 1, "remote": "/pulp/api/v3/remotes/rpm/rpm/018deee6-b18f-7217-a3ee-b6517a65fb45/", "autopublish": false, "metadata_signing_service": null, "package_signing_service": null, "package_signing_fingerprint": null, "retain_package_versions": 0, "checksum_type": null, "metadata_checksum_type": null, "package_checksum_type": null, "gpgcheck": null, "repo_gpgcheck": null, "sqlite_metadata": false, "repo_config": {}, "compression_type": null, "layout": null }
There are 122 repository versions in the Pulp replica server
{ "pulp_href": "/pulp/api/v3/repositories/rpm/rpm/01964640-6f43-71f4-bc0c-2b2bc66c59b5/", "prn": "prn:rpm.rpmrepository:01964640-6f43-71f4-bc0c-2b2bc66c59b5", "pulp_created": "2025-04-18T00:15:50.084713Z", "pulp_last_updated": "2025-10-14T02:25:16.742161Z", "versions_href": "/pulp/api/v3/repositories/rpm/rpm/01964640-6f43-71f4-bc0c-2b2bc66c59b5/versions/", "pulp_labels": { "UpstreamPulp": "0196463e-55e1-72bb-a2ed-738161ade2cd" }, "latest_version_href": "/pulp/api/v3/repositories/rpm/rpm/01964640-6f43-71f4-bc0c-2b2bc66c59b5/versions/121/", "name": "source_lrh8_baseos_x86_64", "description": null, "retain_repo_versions": null, "remote": null, "autopublish": false, "metadata_signing_service": null, "package_signing_service": null, "package_signing_fingerprint": null, "retain_package_versions": 0, "checksum_type": null, "metadata_checksum_type": null, "package_checksum_type": null, "gpgcheck": null, "repo_gpgcheck": null, "sqlite_metadata": false, "repo_config": {}, "compression_type": null, "layout": null }

Start by reproducing Pulp replication from the upstream server and compare the repository settings and versions shown in the issue. Trace how the upstream retain_repo_versions value is handled when the replica repository is created or updated. Done means the replica retains the upstream setting of 1 and does not accumulate all 122 repository versions.