15.0 : cannot delete a connection

[yboujraf]

Dear @rvalyi , @ovnicraft , @pniederlag , @cmayo

Module

connector-jira

Describe the bug

Can't delete a connection even there is no link with project

error message

The operation cannot be completed: another model requires the record being deleted. If possible, archive it instead.
Model: Jira Backend Import Timestamps (jira.backend.timestamp), Constraint: jira_backend_timestamp_backend_id_fkey

##Expected behavior##
The connection needs to be deleted

Additional context
ODOO 15.0 CE

[yboujraf]

Dear,

Any news

BR