api/Adminpage Device-Errors Internal Server Error - after 5 seconds

version: seafile-pro-server-8.0.17
os: Debian GNU/Linux 10
mysql: Ver 15.1 Distrib 10.3.34-MariaDB

after upgrading from 7.1 to 8.0.17 i get the following error by accessing the admin page (sys/device-errors/)

2022-05-19 10:17:15 …/common/seaf-db.c(931): Failed to execute sql SELECT t.repo_id, o.owner_id, t.email, t.token, t.peer_id, t.peer_ip, t.peer_name, t.sync_time, t.client_ver, e.error_time, e.error_con FROM RepoSyncError e, (SELECT u.repo_id, u.email, u.token, p.peer_id, p.peer_ip, p.peer_name, p.sync_time, p.client_ver FROM RepoUserToken u LEFT JOIN RepoTokenPeerInfo p ON u.token = p.token) t, RepoOwner o WHERE e.token = t.token and t.repo_id = o.repo_id: Lost connection to server during query
2022-05-19 10:17:15 repo-mgr.c(2414): DB error when list repo sync errors.

django.request:228 log_response Internal Server Error: /api/v2.1/admin/device-errors/

same via Python-API:

Device Errors
“error_msg”: “Internal Server Error”

real 0m5.213s
user 0m0.139s
sys 0m0.033s

when i clear the device errors it works again - i think its an timeout issue… any ideas ?
direct via. mysql-cli it works,…