Joinscript error in 92univention-fetchmail-schema.inst after applying update to UCS 4.4.3

Hi all,
after applying the update to release 4.4.3 I’m getting a joinscript error in module 92univention-fetchmail-schema.inst
Nevertheless I see no problems in working system.

This is the error in joinscript:

univention-run-join-scripts started
Mo 16. Dez 08:04:22 CET 2019

univention-join-hooks: looking for hook type “join/pre-joinscripts” on mmnucs.IBMMN.local
Found hooks:

RUNNING 92univention-fetchmail-schema.inst
2019-12-16 08:04:23.447047642+01:00 (in joinscript_init)
Object exists: cn=ldapschema,cn=univention,dc=IBMMN,dc=local
INFO: No change of core data of object univention-fetchmail.
Object exists: cn=ldapacl,cn=univention,dc=IBMMN,dc=local
INFO: No change of core data of object 58univention-fetchmail-schema.
No modification: cn=univention-fetchmail,cn=ldapschema,cn=univention,dc=IBMMN,dc=local

No modification: cn=58univention-fetchmail-schema,cn=ldapacl,cn=univention,dc=IBMMN,dc=local

Waiting for activation of the extension object univention-fetchmail: …ERROR: Master did not mark the extension object active within 180 seconds.
ERROR
ucs_registerLDAPExtension: registraton of /usr/share/univention-fetchmail-schema/univention-fetchmail.schema failed.

JOINERR:FAILED: /usr/lib/univention-install/92univention-fetchmail-schema.inst
EXITCODE=1
44bb3b0e-4bc8-4b8b-8102-51039ab91413
univention-join-hooks: looking for hook type “join/post-joinscripts” on mmnucs.IBMMN.local
Found hooks:

Mo 16. Dez 08:07:37 CET 2019
univention-run-join-scripts finished

Any ideas?

Thanks

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