Super-Sync doesn't setup DB

[ujaehrig]

I've followed the README.md. But when starting the docker container and looking into the log, I see the following error:

supersync_db        | 2026-06-12 14:55:28.654 UTC [75] ERROR:  relation "public.user_sync_state" does not exist at character 140
supersync_db        | 2026-06-12 14:55:28.654 UTC [75] STATEMENT:  SELECT "public"."user_sync_state"."user_id", "public"."user_sync_state"."last_snapshot_seq", "public"."user_sync_state"."snapshot_at" FROM "public"."user_sync_state" WHERE ("public"."user_sync_state"."last_snapshot_seq" IS NOT NULL AND "public"."user_sync_state"."snapshot_at" IS NOT NULL) ORDER BY "public"."user_sync_state"."snapshot_at" ASC OFFSET $1

Setup of the database shows the following log:

supersync_db  | CREATE DATABASE
supersync_db  | 
supersync_db  | 
supersync_db  | /usr/local/bin/docker-entrypoint.sh: ignoring /docker-entrypoint-initdb.d/*
supersync_db  | 
supersync_db  | waiting for server to shut down....2026-06-12 14:55:13.680 UTC [41] LOG:  received fast shutdown request
supersync_db  | 2026-06-12 14:55:13.683 UTC [41] LOG:  aborting any active transactions
supersync_db  | 2026-06-12 14:55:13.691 UTC [41] LOG:  background worker "logical replication launcher" (PID 47) exited with exit code 1
supersync_db  | 2026-06-12 14:55:13.692 UTC [42] LOG:  shutting down
supersync_db  | 2026-06-12 14:55:13.694 UTC [42] LOG:  checkpoint starting: shutdown immediate
supersync_db  | 2026-06-12 14:55:13.771 UTC [42] LOG:  checkpoint complete: wrote 921 buffers (5.6%); 0 WAL file(s) added, 0 removed, 0 recycled; write=0.064 s, sync=0.008 s, total=0.080 s; sync files=301, longest=0.004 s, average=0.001 s; distance=4238 kB, estimate=4238 kB
supersync_db  | 2026-06-12 14:55:13.778 UTC [41] LOG:  database system is shut down
supersync_db  |  done
supersync_db  | server stopped
supersync_db  | 
supersync_db  | PostgreSQL init process complete; ready for start up.
supersync_db  | 
supersync_db  | 2026-06-12 14:55:13.804 UTC [1] LOG:  starting PostgreSQL 15.18 on aarch64-unknown-linux-musl, compiled by gcc (Alpine 15.2.0) 15.2.0, 64-bit

I can reach the website, but neither registration fails.

Where is my mistake?