You are trying to create a join or combine data source from Cloud Studio and you receive the message "Combining different solutions is not allowed solution".
SAP Hybris Cloud for Customer
Reproducing the Issue
1. Login to Cloud Studio
2. Trying creating a Join or Combine DataSource object from Cloud Studio
3. After including the fields and click on 'Save'
It gives the error message "Combining different solutions is not allowed solution /1AN/XXXXXXXX"
The data source contains KUT fields extension fields which are created by key user. Since you are creating data source with technical user access from Cloud Studio key user created objects(KUT extension fields) cannot be part of this data source.
Trying to remove those KUT extension fields from the join members used to create the PDI data source and perform the save action again.
In order to figure out if there is one or more extension fields while creating data source, you can check the join data source field ID's in the following term:
KBA , data source , extension fields , AP-RC-ANA , C4C, ByD, Travel: Analytics Tools & Frameworks , Problem