openproject update dont really update

[icf20]

All packages are up to date. Warning: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. OpenPGP signature verification failed: https://dl.packager.io/srv/deb/opf/openproject/stable/15/debian 12 InRelease: Sub-process /usr/bin/sqv returned an error code (1), error message is: Signing key on 6257DF9972462F57A20FFB2AB6D583CCBD33EEB8 is not bound: No binding signature at time 2026-09-04T12:58:35Z because: Policy rejected non-revocation signature (PositiveCertification) requiring second pre-image resistance because: SHA1 is not considered secure since 2026-02-01T00:00:00Z Warning: Failed to fetch https://dl.packager.io/srv/deb/opf/openproject/stable/15/debian/dists/12/InRelease Sub-process /usr/bin/sqv returned an error code (1), error message is: Signing key on 6257DF9972462F57A20FFB2AB6D583CCBD33EEB8 is not bound: No

so what's the solution for this?

[MickLesk]

Its the old debian 12 version 15, we are on debian 13 version 17. Looks like the 15 is deprecated an dl.packager.io