[#198/fix] in의 잘못된 사용으로 마지막 학습지를 받지 않은 구독자들도 구독을 해지하는 문제 해결 #202
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🎫 연관 이슈
resolved: #198
💁♂️ PR 내용
🙏 작업
🙈 PR 참고 사항
📸 스크린샷
in 사용 쿼리 로그
in 사용 쿼리 결과
🤖 테스트 체크리스트