Deactivating account seems to fails

[odelcroi]

In DEV01 when running E2E tests

2026-03-13T09:54:37.630866+01:00 matrix matrix-authentication-service[27176]: 2026-03-13T08:54:37.629329Z INFO mas_tasks::new_queue:700 worker-run-loop-62442 - One scheduled job marked as available
2026-03-13T09:54:37.637158+01:00 matrix matrix-authentication-service[27176]: 2026-03-13T08:54:37.636316Z INFO mas_tasks::new_queue:852 job-deactivate-user-62444 - Running job job.id=01KKK65G4XCACE2DFK66WPKT7F job.queue.name=deactivate-user job.attempt=7
2026-03-13T09:54:37.639648+01:00 matrix matrix-authentication-service[27176]: 2026-03-13T08:54:37.639217Z INFO mas_tasks::user:62 job-deactivate-user-62444 - Killed all browser sessions for user affected=0
2026-03-13T09:54:37.640727+01:00 matrix matrix-authentication-service[27176]: 2026-03-13T08:54:37.640214Z INFO mas_tasks::user:72 job-deactivate-user-62444 - Killed all OAuth 2.0 sessions for user affected=0
2026-03-13T09:54:37.641469+01:00 matrix matrix-authentication-service[27176]: 2026-03-13T08:54:37.641041Z INFO mas_tasks::user:82 job-deactivate-user-62444 - Killed all compatibility sessions for user affected=0
2026-03-13T09:54:37.643158+01:00 matrix matrix-authentication-service[27176]: 2026-03-13T08:54:37.642813Z INFO mas_tasks::user:94 job-deactivate-user-62444 - Killed all compatibility sessions acting as user affected=0
2026-03-13T09:54:37.644390+01:00 matrix matrix-authentication-service[27176]: 2026-03-13T08:54:37.644057Z INFO mas_tasks::user:109 job-deactivate-user-62444 - Killed all compatibility sessions owned by user affected=0
2026-03-13T09:54:37.644886+01:00 matrix matrix-authentication-service[27176]: 2026-03-13T08:54:37.644677Z INFO mas_tasks::user:120 job-deactivate-user-62444 - Removed all email addresses for user affected=0
2026-03-13T09:54:37.645647+01:00 matrix matrix-authentication-service[27176]: 2026-03-13T08:54:37.645280Z INFO mas_tasks::user:126 job-deactivate-user-62444 - Deactivating user user.local_1773391435921_3402-exemple.com on homeserver
2026-03-13T09:54:37.780151+01:00 matrix matrix-authentication-service[27176]: 2026-03-13T08:54:37.779574Z ERROR mas_matrix_synapse::modern:398 job-deactivate-user-62444 - error=Unexpected HTTP response while deleting user in Synapse
2026-03-13T09:54:37.780199+01:00 matrix matrix-authentication-service[27176]: Caused by:
2026-03-13T09:54:37.780249+01:00 matrix matrix-authentication-service[27176]: 0: M_FORBIDDEN: Changing display name is disabled on this server
2026-03-13T09:54:37.780302+01:00 matrix matrix-authentication-service[27176]: 1: HTTP status client error (400 Bad Request) for url (http://localhost:8008/_synapse/mas/delete_user)
2026-03-13T09:54:37.781051+01:00 matrix matrix-authentication-service[27176]: 2026-03-13T08:54:37.779772Z WARN mas_tasks::new_queue:897 job-deactivate-user-62444 - Job failed, will retry in 640s [polls: 15, cpu: 3.9ms, elapsed: 143.5ms] error=Unexpected HTTP response while deleting user in Synapse error.sources=[M_FORBIDDEN: Changing display name is disabled on this server, HTTP status client error (400 Bad Request) for url (http://localhost:8008/_synapse/mas/delete_user)] job.id=01KKK65G4XCACE2DFK66WPKT7F job.queue.name=deactivate-user job.attempt=7