[7.851][BUG][FIXED] while creating dnat rules middleware give error

Hello Friends !

please check the log

when i try to create /clone a dnat rule

thanks

Astaro Beta Report
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Version: 7.851
Type: BUG
State: RESOLVED/FIXED
Reporter: utm_kid
Contributor:  
MantisID: 12250
Target version: 7.860
Fixed in version: 
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