Description of problem:

unable to create a new migration wave when assigning stakeholders and stakeholders groups to it - once trying to getting an error unable to create the migration wave

Version-Release number of selected component (if applicable):

How reproducible:

always

Steps to Reproduce:
1.create example stakeholders and stakeholders groups
2.navigate to migration waves tab
3.create a new migration wave while assigning stakeholders and stakeholders group to it

Actual results:

unable to create the migration wave

Expected results:

migration wave to be created successfully 

Additional info: