120172: The field type of <value> does not match the field type of <value>. Expected <value>, but got <value>

Description

There is a mismatch between the field types of the fields that are trying to be merged.

Solution

Verify that the field names and types match for the input and merge layers.

For example, you cannot match a string field to an integer field. The mismatch may be in fields that were explicitly matched in the field mapping, or fields that were automatically tried to be matched based on the field name.