Assign: Specified cast is not valid. Merge Data Table

we updated with an additional hint

what was done in detail?

ensure / trace the variables and definition e.g. with:
Understanding the 6 Debugging Panels of UiPath in the easiest way possible! - News / Tutorials - UiPath Community Forum

let not mix up LINQ, Data, Flow and modellings as a correct LINQ can fail e.g.

  • used on the wrong place
  • used with variation of data, which are out of expectactions