Crash report seems to come from VMP (Index -1 out of bounds for length 8193

[Anmegum]

Describe the bug The server starts backing up with mod "Textile backup", shortly after it crashes and the crashlog includes only a reference to VMP in the stacktrace.

To Reproduce Steps to reproduce the behavior:

1. install Textile Backup
2. Wait a few backup cycles (it doesnt always crash on the same backup attemp)

Expected behavior The backup running through smoothly as it does all of the other times without getting a crash.

Screenshots -none-

Runtime info (please complete the following information):

• OS: Linux (amd64) version 5.15.74-1-pve
• Minecraft version: 1.20.1
• Mod version: Very Many Players 0.2.0+beta.7.96
• Mod branch: (fill this if you are not using the default ver branches)

Crash reports / logs Crash-report: https://mclo.gs/hNdrhqL

Other mods

Checklist

• [x ] I am using the official version of the mod.
• [ ] I tried the latest development version but the issue persists.
• [x ] I searched for similar open issues and could not find an existing bug report on this.

Additional context

[ishland]

This issue is likely related to Szum123321/textile_backup#123.

Textile backup appears to be saving worlds asynchronously, which might have caused this issue: https://github.com/Szum123321/textile_backup/blob/04533f89fdd4d615f90932f86d46b698339d8f2d/src/main/java/net/szum123321/textile_backup/core/create/ExecutableBackup.java#L69

Changes have been made to prevent asynchronous access to ticket level propagator.