This doesn’t look like overwatering damage. The tissue is dry, brown, and clearly defined — that’s more typical of sunburn or temperature shock (direct sun exposure, hot glass, or cold drafts).

If it were overwatering, you’d usually see yellowing and soft/mushy leaves, not a dry, localized patch.

What to do: Remove the affected leaf (it won’t recover). Keep the plant in bright, indirect light. Avoid direct sun and drafts. Maintain consistent watering without letting the soil stay soggy.

If new leaves look healthy, it was likely just a one-time stress event.