BIP2480
Severity
20 : Error
Message
(<insert_1>, <insert_2>) : The dynamic field reference does not resolve to a reference to a message field.
Explanation
The dynamic field reference supplied must resolve to a message field. References to declared variables and uninitialized references are not acceptable.
Response
Correct the syntax of your ESQL expression in node <insert_1>, around line and column <insert_2>, then redeploy the message flow.