APL (Dyalog Unicode), 22 17 bytes
∊({⍵+⍳≢⍵}¨+\∘≠⊆⊢)
Monadic ≠ doesn't work on TIO because it's got an older version of Dyalog APL, so I've defined a function U to stand in for that.
APL (Dyalog Unicode),
user
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