Project Costing Request Set is failing APP-FND-00806

Issue:

We are getting below error while submitting Request set in oracle apps.

APP-FND-00806: The default value SELECT APPLICATION_NAM
FROM FND_APPLICATION_VL WHERE APPLICATION_ID = $FLEX$ in
invalid for the Source Application segment. Your default
value will be ignored. Please inform your system
administrator that.

Fix:

To implement the solution, please execute the following steps:

1. Logon to the Application using your "System Administrator    Responsibility"
2. Navigate to "Concurrent Set"
3. Query and find your request set
4. Select the Link Stages button
5. Set the Start Stage field.
   Select LOV ==> select the correct process
6. Select Save.
7. Retest the issue.

Ref: (Doc ID 2030023.1)