When you create new service contract from sales quote, an error Type change cross Contract is not supported with Item is trigger.
SAP Cloud for Customer
Reproducing the Issue
Go to the Sales work center.
Go to the Sales Quotes view and search with quote LMN (where LMN is the same quote id).
Open sales quote LMN and go to the Sales Documents facet.
Go to the Contract section and click on the New button.
In the New Contract screen, under field name Type select SRV from drop-down (where SRV is service contract type ).
You get error as Type change cross Contract is not supported with Item.
We do not support creation of service contract from sales quote, only sales contract can be created from quote.
This is an expected system behavior.
Service Contract from Quote , KBA , LOD-LE-COP , Contract Processing , LOD-LE-COP-SRV , Service Contract , Problem