Same operator is showing multiple time in the supervisor Workbench

Summary:

Hello Experts,

I am trying to assign specific operator from the supervisor workbench , when i search with the operator user , the same operator is displaying multiple times and getting the below error

'Couldn't edit operator assignment

You can only assign operators of type employee or contingent worker. (WIE-4426297)

Could you please help me with this issue?

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