SOLVED: Trickplay

[Partition]

Hey,
I'm using Jellyfin 10.9.1 and everything is working fine so far, except that my trickplay task won't start properly.
It finished after 0 seconds with this log:

Code:

[2024-05-16 01:40:11.082 +02:00] [DBG] [40] Emby.Server.Implementations.ScheduledTasks.TaskManager: Executing "Trickplay-Bilder generieren"
[2024-05-16 01:40:11.085 +02:00] [DBG] [24] Jellyfin.Api.Auth.CustomAuthenticationHandler: AuthenticationScheme: "CustomAuthentication" was successfully authenticated.
[2024-05-16 01:40:11.086 +02:00] [DBG] [24] Jellyfin.Api.Auth.CustomAuthenticationHandler: AuthenticationScheme: "CustomAuthentication" was successfully authenticated.
[2024-05-16 01:40:11.096 +02:00] [DBG] [40] Jellyfin.Server.Implementations.Trickplay.TrickplayManager: Trickplay refresh for 156362bd-008f-0601-65a3-214b7d2293e7 (replace existing: False)
... 2000ish more of similar entries....
[2024-05-16 01:40:11.218 +02:00] [DBG] [40] Jellyfin.Server.Implementations.Trickplay.TrickplayManager: Trickplay refresh for d7c27403-9996-3645-ab5f-8bd2bf9177c6 (replace existing: False)
[2024-05-16 01:40:11.218 +02:00] [INF] [40] Emby.Server.Implementations.ScheduledTasks.TaskManager: "Trickplay-Bilder generieren" Completed after 0 minute(s) and 0 seconds

But my config/metadata/library/* folders only have the chapters pictures that were created long before and the usual logo, posters, etc. files. So I don't know what it tries to replace.

My system.xml settings:

Code:

  <TrickplayOptions>
    <EnableHwAcceleration>true</EnableHwAcceleration>
    <EnableHwEncoding>true</EnableHwEncoding>
    <ScanBehavior>NonBlocking</ScanBehavior>
    <ProcessPriority>BelowNormal</ProcessPriority>
    <Interval>10000</Interval>
    <WidthResolutions>
      <int>320</int>
    </WidthResolutions>
    <TileWidth>10</TileWidth>
    <TileHeight>10</TileHeight>
    <Qscale>4</Qscale>
    <JpegQuality>90</JpegQuality>
    <ProcessThreads>0</ProcessThreads>
  </TrickplayOptions>

How can I override "replace existing: true" and force the trickplay generation?
Is there any tool or rule of thumb to estimate the general foldersize for the trickplay files? I read that they can grew substantially.

Thanks in advance for your help.