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This question already has an answer here:

I don't know what this warning means

Overfull \hbox (95.6542pt two wide) in paragraph at lines 94--95

I added

\showboxdepth=\maxdimen
\showboxbreadth=\maxdimen

from other repost, but the warning still going

marked as duplicate by Henri Menke, Stefan Pinnow, user13907, Seamus, Mensch Aug 20 '16 at 11:52

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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It means that something is 95pt (over 3cm) wider than the space that it is assigned to. So most likely sticks into the right margin by that amount.

The source for the problematic text is on lines 94 to 95 of (one of) your source files.

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