Figuring out Errors and Warnings in MinimServer Log

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"Error: group contains tracks that aren't consecutive: Part I in album Bach: Complete Cantatas......"

I used the GROUPING tag from MUSICHI to indicate Acts from Oratorios and Cantatas. I aliased it to the GROUP of MinimServer. I get an error when an Act starts on one disc of the Multidisc Album and continues on the succeeding disc which is common. I see in the documentation that MInimServer does not allow this.

Why?

Is there a way to change the MininServer behaviour? I suppose i could just remove the GROUPING:GROUP alias?