Unable to startup MySQL8.4 Database Server on TS-453A

I am trying to use MySQL8.4 on my TS-453A after I did sucessfully installed it on my TS-453 Pro. Unfortunately, the server won’t start with following startup log:
2025-04-27T19:32:25.321482Z 0 [System] [MY-015017] [Server] MySQL Server Initialization - start.
2025-04-27T19:32:25.326002Z 0 [Warning] [MY-011070] [Server] ‘binlog_format’ is deprecated and will be removed in a future release.
2025-04-27T19:32:25.326323Z 0 [System] [MY-013169] [Server] /share/CACHEDEV1_DATA/.qpkg/MySQL84/bin/mysqld (mysqld 8.4.0) initializing of server in progress as process 6673
2025-04-27T19:32:25.333401Z 0 [ERROR] [MY-010457] [Server] --initialize specified but the data directory has files in it. Aborting.
2025-04-27T19:32:25.333478Z 0 [ERROR] [MY-010187] [Server] Could not open file ‘/var/log/mariadb5/mariadb.err’ for error logging: No such file or directory
2025-04-27T19:32:25.333662Z 0 [ERROR] [MY-013236] [Server] The designated data directory /share/CACHEDEV1_DATA/QMySQL/ is unusable. You can remove all files that the server added to it.
2025-04-27T19:32:25.333763Z 0 [ERROR] [MY-010119] [Server] Aborting
2025-04-27T19:32:25.335021Z 0 [System] [MY-015018] [Server] MySQL Server Initialization - end.

Is anyone able to help
With wam regards