VBA | Code stuck on "next"

Howdy,

Could anyone give a hint in this?
Code performs as supposed to "Next Z", but then doesn't leave it. When i abort the code execution the last line executed is this one.
Even though it did the whole sheet as supposed to.

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Above is the highlighted part of the code that i believe the error is.
Below is the whole code

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Welcome to the forum

Please attach a sample workbook (not a picture or pasted copy). Make sure there is just enough data to demonstrate your need. Include a BEFORE sheet and an AFTER sheet in the workbook if needed to show the process you're trying to complete or automate. Make sure your desired results are shown, mock them up manually if necessary.

Remember to desensitize the data.

Click on GO ADVANCED and then scroll down to Manage Attachments to open the upload window.