Time constraint for infotype &1 personnel number &4 violated

What causes this issue?

The system found data in the database that is inconsistent with regard
to the time constraint for personnel numbers &V4& &V3& in infotype &V1&
subtype &V2&.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Inform your system administrator.

Procedure for System Administrators

According to the time constraint specified, observe the following
restrictions:
For time constraint 1, overlaps and gaps are not permitted.
For time constraint 2, overlaps are not permitted.
For time constraint A and B, at most one data record from 1.1.1800 to
31.12.9999 can exist.
For key date infotypes, no data records with start and end dates that
differ from each other can exist.
If the infotype is unlockable, no locked data records can exist.
If the infotype does not allow the use of object identification
(OBJPS), this cannot be used.
For infotypes without subtypes, no subtypes can be used.
The start date of a data record can never be after the end date.
Since SAP standard transactions normally ensure data consistency
automatically, consider also the following causes:
The table settings for tables T582V and T582W were changed. However,
existing data was not updated.
The system wrote data directly to the database using a customer program
to bypass the standard SAP transactions.

Error message extract from SAP system. Copyright SAP SE.