Error in SAP MII transaction

I get the following error in an SAP MII Transaction. - Also please screenshot attached.  Please advice.

[ERROR] Uncaught exception from Projects_MDO_Update, com.sap.xmii.Illuminator.logging.LHException: com.sap.sql.log.OpenSQLException: Failed to set the parameter 1 of the statement >>UPDATE MDO34309 SET FIELD1 = ?,FIELD2 = ?,FIELD3 = ?,FIELD4 = ?,LASTQUERYEXECUTION = ?,LASTQUERYEXECUTIONBY = ? WHERE FIELD2 =75<<: Cannot assign NULL. The setNull() method can only be used if the corresponding column is nullable.

[ERROR] [Projects_MDO_Update]com.sap.xmii.Illuminator.logging.LHException: com.sap.sql.log.OpenSQLException: Failed to set the parameter 1 of the statement >>UPDATE MDO34309 SET FIELD1 = ?,FIELD2 = ?,FIELD3 = ?,FIELD4 = ?,LASTQUERYEXECUTION = ?,LASTQUERYEXECUTIONBY = ? WHERE FIELD2 >=0<<: Cannot assign NULL. The setNull() method can only be used if the corresponding column is nullable.