DeleteSCIMConfiguration unconditionally deleted the underlying OAuth2
connector together with the SCIM bridge and config. When the same
connector was also referenced from access_sources -- which happens
when Google Workspace is used for both SCIM and access reviews -- the
access_sources.connector_id foreign key (NO ACTION) rejected the
DELETE, aborting the whole transaction. Nothing was deleted and the
resolver returned an INTERNAL error.
Check the access_sources reference count before deleting the connector
and skip the connector delete when it is still in use. The bridge's
own connector_id FK is ON DELETE SET NULL, so dropping the bridge
alone is sufficient to unbind SCIM; leaving the connector untouched
keeps the access source working.
Signed-off-by: Aurélien Sibiril <81782+aureliensibiril@users.noreply.github.com>
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