New answers tagged spfield
The answer of Cann0nF0dder is applicable to fields of type "LookupMulti" too. I allready tried. For short: "In order to allow enter multiple values into field with Type="UserMulti" you must set attribute Mult="TRUE"." on my revised case is valid too for: "...Type="LookupMulti"..."
after more digging, what I found is that, I had 2 different column in that list which has same GUID. there is a script on this link which helped me to found those fields. Then I removed them from my list. Luckily, those fields were not used, so all worked smoothly. I hope it helps others
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