SAP Message CACSPH034 - Cannot generate: Existing periods are inconsistent

Diagnosis
You are attempting to generate newperiods forperiod rule&v1& (versionV2). however the check of existing periods has detected thatinconsistencies exist. The following error was detected:
V3v4

System Response
The generation of periods in canceled.

Procedure
Check the periods for period rule &v1& (version &v2&).