This error can be caused if the currentSchema property does not match the schema name of the tables and indexes that you created. The error messages show the J2C authentication alias that is being used.
error message: BBOO0220E: SCHD0125E: Unexpected exception while processing the acquireLease operation: com.ibm.ws.leasemanager.LeaseException: SCHD0300E: Error during Database operation, localized message is _ :nativePrepareInto:1377: DB2 engine SQL error, SQLCODE = -204, SQLSTATE = 42704, error tokens = MDDBU.WSCH_LMGR, Vendor Error Code is -204, ANSI-92 SQLState is 42704, cause: [IBM/DB2][T2zos/2.9.32]T2zosPreparedStatement.readDescribeInput_ :nativeDescribeInput:2006: DB2 engine SQL error, SQLCODE = -516, SQLSTATE = 26501, error tokens = .. .. com.ibm.db2.jcc.t2zos.y: [IBM/DB2][T2zos/2.9.32]T2zosPreparedStatement.readDescribeInput:2006: DB2 engine SQL error, SQLCODE = -516, SQLSTATE = 26501, ...