BUG: Raise MergeError when suffixes result in duplicate column names … #23633

Job	Run time
python-dev	0s
Linux-32-bit	3m 8s
Linux-Musl	3m 6s
Pyodide build	3m 7s
macos-13 actions-310.yaml	3m 24s
macos-13 actions-312.yaml	3m 28s
macos-13 actions-313.yaml	3m 27s
windows-latest actions-310.yaml	3m 5s
macos-14 actions-312.yaml	3m 24s
windows-latest actions-312.yaml	3m 11s
windows-latest actions-311.yaml	3m 4s
macos-13 actions-311.yaml	3m 30s
windows-latest actions-313.yaml	3m 7s
macos-14 actions-313.yaml	3m 21s
macos-14 actions-310.yaml	3m 22s
macos-14 actions-311.yaml	3m 9s
Pypy	3m 11s
Pyarrow Nightly	3m 20s
ubuntu-24.04 actions-313.yaml	3m 21s
ubuntu-24.04-arm actions-313.yaml	3m 21s
ubuntu-24.04 actions-311.yaml	3m 22s
Downstream Compat	3m 21s
Numpy Dev	3m 19s
Locale: zh_CN	3m 21s
ubuntu-24.04-arm actions-310.yaml	3m 22s
Freethreading	3m 20s
ubuntu-24.04 actions-310.yaml	3m 20s
Future infer strings	3m 21s
ubuntu-24.04 actions-312.yaml	3m 19s
ubuntu-24.04-arm actions-312.yaml	3m 20s
ubuntu-24.04-arm actions-311.yaml	3m 21s
Minimum Versions	3m 20s
Locale: it_IT	3m 20s
Future infer strings (without pyarrow)	3m 20s
	1h 48m 52s

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