Synapse workspace deployment with custom parameters in Workspace Templates

Could not figure out full dependancy model for these artifacts. Check template for correctness.

Microsoft.Synapse/workspaces/pipelines
Dependency Not found: Microsoft.Synapse/workspaces/testworkspace/pipelines/PL1

I'm using  Synapse workspace deployment with custom parameters in Workspace Templates

Added below script in template-parameters-definition.json as well. But throwing error