Search help assignment is not inherited from base object (SD_CDS_ENTITY151)

Hello experts,

I'm trying to create custom CDS in S4/Hana Public Cloud (2208).

I'm trying to get through the test scenario of BGJ: https://rapid.sap.com/bp/#/scopeitems/BGJ

I noticed this warning I also had for other creation attempts:

Search help assignment for field 'EngagementProject' is not inherited from base object

Message no. SD_CDS_ENTITY151

Could you explain me where does this come from and how to avoid it?

Thanks a lot for your guidance!