How To Fix SDDL_PARSER_MSG113 - The annotation "Environment.SystemField #CLIENT" is not allowed here

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 113

• Message text: The annotation "Environment.SystemField #CLIENT" is not allowed here

What causes this issue?

The annoation '@Environment.SystemField #CLIENT' can only be used
if client handling is activated for the table function,
that is, if the annotation '@ClientDependent = true'
is set or not listed at all. (<DS:ABEN.CDS_F1_DEFINE_TABLE_FUNCTION>CDS
Table Functions</>)

Error message extract from SAP system. Copyright SAP SE.