BUG: pivot_table with overlapping values #22986

Job	Run time
Pyodide build	6m 14s
Linux-Musl	6m 2s
Linux-32-bit	6m 2s
python-freethreading	6m 14s
python-dev (macOS-13)	6m 14s
python-dev (macOS-14)	6m 13s
python-dev (ubuntu-22.04)	6m 14s
python-dev (windows-latest)	6m 8s
macos-13 actions-310.yaml	6m 24s
macos-13 actions-311.yaml	6m 13s
macos-13 actions-312.yaml	6m 19s
macos-14 actions-310.yaml	6m 12s
macos-14 actions-311.yaml	6m 17s
macos-14 actions-312.yaml	6m 17s
windows-latest actions-311.yaml	6m 6s
windows-latest actions-312.yaml	5m 54s
windows-latest actions-310.yaml	6m 11s
Minimum Versions	6m 14s
Future infer strings (without pyarrow)	11m 0s
Locale: zh_CN	6m 16s
Locale: it_IT	6m 13s
Downstream Compat	5m 55s
Numpy Dev	6m 16s
Pyarrow Nightly	6m 15s
Future infer strings	11m 1s
Pypy	1m 15s
ubuntu-22.04 actions-310.yaml	11m 1s
ubuntu-22.04 actions-311.yaml	11m 2s
ubuntu-22.04 actions-312.yaml	11m 1s
ubuntu-24.04-arm actions-311.yaml	10m 59s
ubuntu-24.04-arm actions-312.yaml	10m 59s
ubuntu-24.04-arm actions-310.yaml	10m 59s
	3h 51m 40s

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