@Indra it seems as if you are trying to use the {{schema_id}} as a variable. You need to remove it from the headers section and only have it defined within the params. If using as a variable, see the documentation here: Store and reuse values using variables | Postman Learning Center
You can also try to manually add the schema id in the params with the actual value just to see if that works, prior to adding the variable.
Are you inputting the Schema ID itself into the parameters of the PATCH request? The error message is referencing {{schema_id}} and not the specific Schema ID that you provided above. Could you provide some more context? Thanks!
@Indra it seems as if you are trying to use the {{schema_id}} as a variable. You need to remove it from the headers section and only have it defined within the params. If using as a variable, see the documentation here: Store and reuse values using variables | Postman Learning Center
You can also try to manually add the schema id in the params with the actual value just to see if that works, prior to adding the variable.
