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BUG: pd.crosstab cannot handle series with the same name

BUG: pd.crosstab cannot handle series with the same name: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). c = pd.Series(rand(3)) pd.crosstab(c,c)

Part of FineEnvs/MiMo-V2.6-RL-harbor-code.