diff --git a/src/main/java/com/practice/course_registration/domain/subject/service/CourseEnrollmentService.java b/src/main/java/com/practice/course_registration/domain/subject/service/CourseEnrollmentService.java
deleted file mode 100644
index 5702d7e..0000000
--- a/src/main/java/com/practice/course_registration/domain/subject/service/CourseEnrollmentService.java
+++ /dev/null
@@ -1,107 +0,0 @@
-package com.practice.course_registration.domain.subject.service;
-
-import com.practice.course_registration.domain.member.domain.Member;
-import com.practice.course_registration.domain.member.repository.MemberRepository;
-import com.practice.course_registration.domain.subject.domain.MemberSubject;
-import com.practice.course_registration.domain.subject.domain.Subject;
-import com.practice.course_registration.domain.subject.repository.MemberSubjectRepository;
-import com.practice.course_registration.domain.subject.repository.SubjectRepository;
-import com.practice.course_registration.global.apiPayload.code.status.ErrorStatus;
-import com.practice.course_registration.global.apiPayload.exception.handler.ErrorHandler;
-import com.practice.course_registration.global.redis.repository.LuaRepository;
-import lombok.RequiredArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-import org.springframework.stereotype.Service;
-import org.springframework.transaction.annotation.Transactional;
-
-import java.util.List;
-
-@Service
-@RequiredArgsConstructor
-@Slf4j
-public class CourseEnrollmentService {
-
-    private final MemberRepository memberRepository;
-    private final SubjectRepository subjectRepository;
-    private final MemberSubjectRepository memberSubjectRepository;
-    private final LuaRepository luaRepository; // holdKey 삭제용
-    private static final int MAX_SCORE = 10;
-
-    // 반드시 public이어야 다른 클래스에서 호출 가능
-    @Transactional
-    public void processEnrollment(Long subjectId, Long memberId) {
-        // 멤버 찾기
-        Member member = findMemberById(memberId);
-
-        // 해당 과목 찾기
-        Subject subject = findSubjectById(subjectId);
-
-        if (memberSubjectRepository.findByMemberIdAndSubjectId(memberId, subjectId).isPresent()) {
-            throw new ErrorHandler(ErrorStatus.ALREADY_APPLY_SUBJECT);
-        }
-
-        if (member.getRegisteredScore() + subject.getScore() > MAX_SCORE) {
-            throw new ErrorHandler(ErrorStatus.OVER_SOCRE_POSSIBLE);
-        }
-
-        // 연관관계 탐색 대신 memberId로 신청 내역 조회 후 과목을 id로 조회
-        List<Long> enrolledSubjectIds = memberSubjectRepository.findAllByMemberId(memberId).stream()
-                .map(MemberSubject::getSubjectId)
-                .toList();
-        List<Subject> enrolledSubjects = subjectRepository.findAllById(enrolledSubjectIds);
-
-        int isSameCode = enrolledSubjects.stream()
-                .filter(subj ->
-                        subj.getCode().equals(subject.getCode())
-                )
-                .toList()
-                .size()
-                ;
-
-        if (isSameCode != 0) {
-            log.error("이미 신청한 과목");
-            throw new ErrorHandler(ErrorStatus.ALREADY_APPLY_SUBJECT);
-        }
-
-        boolean conflict = enrolledSubjects.stream()
-                .filter(subj ->
-                        subj.getSubjectDay() == subject.getSubjectDay()
-                )
-                .anyMatch(subj -> subj.conflictCheck(subject))
-                ;
-
-        if (conflict) {
-            log.error("시간 충돌");
-            throw new ErrorHandler(ErrorStatus.CONFLICT_COURSE_TIME);
-        }
-
-        int result = subjectRepository.workerIncreaseRegistered(subject.getId());
-
-        if (result != 1) {
-            log.error("DB 정합성 문제 발생: result=" + result);
-            throw new ErrorHandler(ErrorStatus.ENROLL_FAILED);
-        }
-
-        // 신청학점 추가
-        member.addScore(subject.getScore());
-
-        // 저장
-        MemberSubject memberSubject = MemberSubject.builder()
-                .memberId(memberId)
-                .subjectId(subject.getId())
-                .build();
-
-        memberSubjectRepository.save(memberSubject);
-
-        // redis hold key 삭제
-        luaRepository.deleteHoldKeyOnly(subject.getId(), memberId);
-    }
-
-    private Member findMemberById(Long memberId) {
-        return memberRepository.findById(memberId).orElseThrow(() -> new ErrorHandler(ErrorStatus.MEMBER_NOT_FOUND));
-    }
-
-    private Subject findSubjectById(Long subject) {
-        return subjectRepository.findById(subject).orElseThrow(() -> new ErrorHandler(ErrorStatus.SUBJECT_NOT_FOUND));
-    }
-}
\ No newline at end of file
diff --git a/src/main/java/com/practice/course_registration/global/redis/service/IdempotencyService.java b/src/main/java/com/practice/course_registration/global/redis/service/IdempotencyService.java
index 36a853d..fb97f13 100644
--- a/src/main/java/com/practice/course_registration/global/redis/service/IdempotencyService.java
+++ b/src/main/java/com/practice/course_registration/global/redis/service/IdempotencyService.java
@@ -3,7 +3,6 @@
 import com.practice.course_registration.global.redis.utils.RedisKeyUtils;
 import java.time.Duration;
 import lombok.RequiredArgsConstructor;
-import org.springframework.boot.autoconfigure.cache.CacheProperties.Redis;
 import org.springframework.data.redis.core.StringRedisTemplate;
 import org.springframework.stereotype.Service;
 
@@ -20,7 +19,6 @@ public class IdempotencyService {
     public boolean rateLimitAllow(Long memberId, int limit, Duration ttl) {
         String key = RedisKeyUtils.rateLimitKey(memberId);
         Long cnt = stringRedisTemplate.opsForValue().increment(key);
-        System.out.println("cnt : " + cnt);
         // 첫 요청인 경우 -> TTL 1로 세팅
         if (cnt != null && cnt == 1L) {
             stringRedisTemplate.expire(key, ttl);
diff --git a/src/main/java/com/practice/course_registration/global/redis/service/PublishIssueTokenScheduler.java b/src/main/java/com/practice/course_registration/global/redis/service/PublishIssueTokenScheduler.java
index 56459e2..6703322 100644
--- a/src/main/java/com/practice/course_registration/global/redis/service/PublishIssueTokenScheduler.java
+++ b/src/main/java/com/practice/course_registration/global/redis/service/PublishIssueTokenScheduler.java
@@ -21,7 +21,7 @@ public void issue() {
         try {
             long cnt = luaRepository.publishIssueTokens(PERMITS_PER_TICKS, TOKEN_TTL);
             if (cnt > 0) {
-                log.info("토큰 발급 성공: count={}, sample={}", cnt);
+                log.info("토큰 발급 성공: count={}", cnt);
             }
         } catch (Exception e) {
             log.error("토큰 발급 실패", e);
diff --git a/src/main/java/com/practice/course_registration/global/redis/service/WaitQueueService.java b/src/main/java/com/practice/course_registration/global/redis/service/WaitQueueService.java
index 40c9300..876a11a 100644
--- a/src/main/java/com/practice/course_registration/global/redis/service/WaitQueueService.java
+++ b/src/main/java/com/practice/course_registration/global/redis/service/WaitQueueService.java
@@ -1,7 +1,6 @@
 package com.practice.course_registration.global.redis.service;
 
 import com.practice.course_registration.global.redis.utils.RedisKeyUtils;
-import java.time.Duration;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.data.redis.core.StringRedisTemplate;