SAP Message AH852 - Upper limit of interval &1 must be >= time basis of &2 days

Diagnosis
The time basis of the price is converted to days if required for theinterval comparison (based on 12 months = 365 days). If necessary, theupper limit is rounded up.

Procedure
Note that if you do not wish to use intervals, do not enter any valuesin the fields Lower limit of interval and Upper limit ofinterval.