BUG: Raise MergeError when suffixes result in duplicate column names … #23634

Job	Run time
Linux-32-bit	21m 11s
Linux-Musl	15m 50s
python-dev	0s
windows-latest actions-310.yaml	35m 6s
macos-14 actions-311.yaml	21m 46s
macos-14 actions-312.yaml	21m 37s
macos-13 actions-313.yaml	47m 45s
windows-latest actions-311.yaml	35m 54s
macos-14 actions-313.yaml	21m 53s
macos-14 actions-310.yaml	24m 13s
windows-latest actions-313.yaml	42m 12s
macos-13 actions-311.yaml	29m 7s
windows-latest actions-312.yaml	35m 9s
macos-13 actions-310.yaml	27m 26s
macos-13 actions-312.yaml	31m 10s
ubuntu-24.04-arm actions-312.yaml	35m 8s
ubuntu-24.04 actions-312.yaml	43m 2s
Pyodide build	26m 58s
Downstream Compat	5m 11s
Minimum Versions	21m 56s
Freethreading	21m 32s
Locale: zh_CN	23m 4s
ubuntu-24.04-arm actions-310.yaml	34m 9s
ubuntu-24.04-arm actions-313.yaml	34m 11s
ubuntu-24.04 actions-313.yaml	48m 41s
Numpy Dev	16m 31s
Future infer strings (without pyarrow)	36m 55s
Pyarrow Nightly	20m 11s
Future infer strings	42m 54s
ubuntu-24.04-arm actions-311.yaml	32m 58s
Pypy	1m 18s
Locale: it_IT	23m 17s
ubuntu-24.04 actions-311.yaml	42m 22s
ubuntu-24.04 actions-310.yaml	45m 46s
	16h 6m 23s

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