& : Rule key figure/characteristic inconsistent

What causes this issue?

Error &V2& occurred when checking the update rules for key figure &V1&
against the information structure definition.
Error:
Key figure &V1& does not exist in the information structure.
Characteristic &V3& does not exist in the information structure, but
does exist in the update rules for the characteristics.
Characteristic &V3& of the information structure is missing from the
update rules for the characteristics.
Unit &V3& of the key figure in the update rule and unit &V4& of the key
figure in the information structure are different.
Source unit &V3& of the key figure of the update rule and the source
unit &V4& determined for the source field are different.

System Response

The system cannot generate the update rules.

How to fix this error?

Errors 1 to 4: Delete the update rule and recreate the update rule
using function 'Restore key figures'.
Error 5: In the rules for the key figure, change either the event, the
source field name, or the source table and then reverse the change. In
doing so, the source unit is regenerated.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.