scib mstrics, kBET issue

[ksa-dukenus]

Hi, I get the following warning when running the scib metrics and results with a blank kBET column while the other metrics work fine. Hope I can get some clues on how to solve this issue.

_kbet.py:212: RuntimeWarning: Mean of empty slice
final_score = np.nanmean(kbet_scores["kBET"])