Hi @Aswin, The error occurs because changing the variable type from string to number causes the inputs or outputs used elsewhere in the flow to become incompatible or unmapped. When the type is changed to number, existing inputs and outputs that were mapped as strings no longer match, leading to errors. However, if the type is kept as string, the input mapping remains intact and no errors occur.
So, the root cause of the error is that changing the variable type breaks the input and output mapping in the flow, which needs to be updated accordingly to handle the new data type.