Node Red write to Data Layer missmatch

Hello everyone, 

I simply want to write a value from the Data Layer (DeviceBridge) in an aggregated form to another Varible (created in PLC). Both have the same datatype (double). 
When I want to write the value from the Device Bridge Data Layer Variable to the PLC Data Layer Variable in Node Red, the Data Layer Request Node response with an error message: "CtrlxProblemError: DL_TYPE_MISMATCH"
I don´t unterstand that error, because both variables have the same datatype and the PLC Variable is allowed for read and write. 

I´m using the 1.20 Version with the newest updates and I also updated the ctrlx automation nodes to the newest version.
Thank you in advance.