I have one table customer and 1 temp view which I am creating from the incremental file and using as a source in merge command. Earlier the notebook was working fine from the adf pipeline, but from past few days, I am getting an error states that my target table is not a delta table, but earlier it was executing the merge command properly. 

Is it a databricks glitch or seriously an issue from my side.

Catalog Name I am picking from the Key vault and its working fine for other tables 

Error - he feature is not supported: Table `[REDACTED]`.`schema-we-001`.`Customer` does not support MERGE. Please check the current catalog and namespace to make sure the qualified table name is expected, and also check the catalog implementation which is configured by "spark.sql.catalog". SQLSTATE: 0A000