hotfix: error fix

Author: gunwoong1630

src/main/java/sevenstar/marineleisure/meeting/repository/ParticipantRepository.java

@@ -23,5 +23,5 @@ public interface ParticipantRepository extends JpaRepository<Participant, Long>
 
 	boolean existsByUserId(Long userId);
 
-	boolean existsByMeetingIdAndMemberId(Long meetingId, Long memberId);
+	boolean existsByMeetingIdAndMeetingId(Long meetingId, Long memberId);
 }

src/main/java/sevenstar/marineleisure/meeting/validate/ParticipantValidate.java

@@ -35,7 +35,7 @@ public int getParticipantCount(Long meetingId){
 
 	@Transactional(readOnly = true)
 	public void verifyNotAlreadyParticipant(Long meetingId, Long memberId){
-		if(participantRepository.existsByMeetingIdAndMemberId(meetingId, memberId)){
+		if(participantRepository.existsByMeetingIdAndMeetingId(meetingId, memberId)){
 			throw new CustomException(ParticipantError.ALREADY_PARTICIPATING);
 		}
 	}