How To Fix GH302 - Field & is not allowed for defining foreign keys

GH302 - Overview

• Message type: E = Error

• Message class: GH - Help functions and tools in FI-SL

• Message number: 302

• Message text: Field & is not allowed for defining foreign keys

What causes this issue?

Field &V1& is maintained by SAP and it is not recommended that you use
this field to define foreign keys.

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?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message GH302 - Field & is not allowed for defining foreign keys ?

  The SAP error message GH302, which states "Field & is not allowed for defining foreign keys," typically occurs when you are trying to define a foreign key relationship in a database table, but the field you are attempting to use does not meet the necessary criteria for foreign key definitions.
  
  Cause:
  
  Field Type: The field you are trying to use as a foreign key may not be of a compatible data type with the primary key of the referenced table.
  Field Attributes: The field may not have the required attributes (e.g., it might not be a key field or it may not be defined as a unique field).
  Technical Settings: The technical settings of the field may not allow it to be used as a foreign key.
  Field Length: The length of the field may not match the length of the corresponding primary key field in the referenced table.
  Domain Issues: The field may be based