Error
If you are receiving the Salesforce Error "ID Value of Incorrect Type" this means that an ID being sent to Salesforce is not the correct type that Salesforce is expecting.
For example, some fields in Salesforce can only accept certain ID types (e.g., Contact ID, Account ID, etc.). If you map a value for an ID of a different type, you will see this error.
Additionally, if you are mapping an ID twice within your connector, you might see this error as well. If your error message is showing multiple IDs (For example, "2.1. Create Attachment - Parent ID: id value of incorrect type: 00P41000005zgucEAA 00P41200405arucABB") then there is likely an ID that is double mapped in your connector.