SAP Message /IBS/RB183 - Planned records that are not selected will also be reversed

Diagnosis
The actual record(s) that you have selected for resetting refer to avaluation sheet that is linked to other actual records. This means thatyou have not selected all of the actual records that are linked to therelevant valuation sheet for resetting.
To ensure that the value adjustment position is consistent, both theselected and unselected actual records that are linked to the relevantvaluation sheet are reset.

Procedure
If you do not want to reset the actual records, cancel processing whenthe system prompts you for the posting period.