A user defined action (UDA) appears to be used by workflows on another site. This isn't the actual case and the below instructions will correct this.

Take note of the following:

1. UDA name
2. Workflow Name
3. Workflow version (in UDA Analyzer)

 
Use the following SQL script to clean this up
 
-- Get UDA Id
 SELECT *
    FROM UserDefinedActions
   WHERE 1=1
         AND [Name] = 'UDA Name'
 
-- Get Published Workflow Id
  SELECT *
    FROM PublishedWorkflows
   WHERE 1=2
         OR (WorkflowName = 'Workflow Name' AND [Version] = 3)
         OR (WorkflowName = 'Workflow 2' AND [Version] IN (18,19))                --Multiple workflows
         OR (WorkflowName = 'Workflow 3' AND [Version] = 4) –Multiple Workflows
 
-- Find reference records
  SELECT *
    FROM UdaUsage
   WHERE 1=1
         AND UdaId = <ID of your UDA>
         AND PublishedWorkflowId IN (ID of Published workflow) –Separate multiple workflows with a comma
 
-- Remove reference records
  DELETE
    FROM UdaUsage
   WHERE UdaId = <ID of your UDA>
         AND PublishedWorkflowId IN (ID of Published workflow) –Separate multiple workflows with a comma