Upgrade to 15 / Extension was not found: btree_gist 1.6 (available 1.7)

Hello,

I am trying to do a major version upgrade from 14.8 to 15.3.

It fails because:

Database operation majorVersionUpgrade failed: "major version upgrade failed.
Error from server (https://stackgres.io/doc/1.5/api/responses/error#extension-not-found):
admission webhook "sgcluster.stackgres-operator.stackgres" denied the request:
Extension was not found: btree_gist 1.6 (available 1.7)"

btree_gist 1.7 is not available for 14 so I cannot update the extension version beforehand. Is there a workaround to ignore the extension version and use the one available?

Thank you