Trunk unlock button stop work after fob battery change

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Hi all! My key fob signal strength was reduced and I am tried to change the battery. I do exact like was in instruction 🔑 2018 Ford Fusion Key Fob Battery Size and Replacement Guide and my signal really start work good, except the trunk button stop work at all 🤪

Can the opposite voltage make this problem? Should I replace the whole key fob or something can be repaired here? Thank's in advance guys.
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