Two Employee Rows Created only one shows Gender but not dual Assignment

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We are running an "All Employees" report and there appeared to be an anomaly on a single employee where it returned two rows of identical data.

The only difference was Gender was in one row but not the other.

We dont use active multi-assignments, we did check this and that data was the same on both rows.

Could there be a reason as to why Gender would create two rows of data?

thank you

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