Diagnosis
Grouping for the '&V1&' field has been reset as grouping in thepriority sequence must be defined without gaps, otherwise grouping inthe tree is not possible.
Example:
Field Priority
Planning plant 1
Material type 2
ABC-indicator 3
In this sort, it is not possible to set the grouping indicator just forthe ABC indicator. If you want to group by ABC indicator, you must alsogroup for material type and planning plant.

System Response
The indicator for grouping will be deleted in the '&V1&' field.

Procedure
If you wish to group for the '&V1&' field in the tree, you must alsoset the grouping indicator for the fields with lower priority values.