Syntax Error in derby-jdbc2-service.xml

in the line
DELETE_MARKED_MESSAGES_WITH_TX = DELETE FROM JMS_MESSAGES WHERE EXITS (SELECT JMS_TRANSACTIONS.TXID FROM JMS_TRANSACTIONS \
WHERE JMS_TRANSACTIONS.TXID = JMS_MESSAGES.TXID) \
AND JMS_MESSAGES.TXOP = ?

there's a syntax error on EXITS istead EXISTS