Message type: E = Error
Message class:  HRPSGB_HER - HR PS GB Higher Education Messages (USS, HESA etc) 
Message number: 138
Message text: Field 'Activity Code' or "Cost centre' contains a default value for &3
At least one of the fields 'Activity Code' (&V1&) and 'Cost centre'(
&V2&) contains a default value.
This will lead to error during generation of HESA NISR return as
default values are not allowed for 'Activity Code 01' and 'Cost centre
01'.
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.
The SAP error message HRPSGB_HER138 indicates that there is an issue with the "Activity Code" or "Cost Centre" fields in the context of a specific operation or transaction. This error typically arises in the Human Resources (HR) module, particularly when dealing with personnel actions, time management, or payroll processing.
Cause: Default Values: The error suggests that the system is trying to use a default value for either the "Activity Code" or "Cost Centre" fields, which may not be valid or applicable in the current context.
Configuration Issues: There may be configuration settings in the system that are not properly set up, leading to the use of default values that do not meet the required criteria. Missing Data: The required data for the "Activity Code" or "Cost Centre" may be missing or incorrectly entered in the relevant infotypes or master data records. Authorization Issues: Sometimes, the user may not have the necessary authorizations to access or
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