diff --git a/src/main/kotlin/roomescape/schedule/business/ScheduleValidator.kt b/src/main/kotlin/roomescape/schedule/business/ScheduleValidator.kt
index e81739f4..d04dede1 100644
--- a/src/main/kotlin/roomescape/schedule/business/ScheduleValidator.kt
+++ b/src/main/kotlin/roomescape/schedule/business/ScheduleValidator.kt
@@ -41,13 +41,13 @@ class ScheduleValidator(
         val time: LocalTime = request.time
         val themeId: Long = request.themeId
 
-        validateAlreadyExists(date, themeId, time)
+        validateAlreadyExists(storeId, date, themeId, time)
         validateNotInPast(date, time)
         validateTimeNotConflict(storeId, request.date, request.themeId, request.time)
     }
 
-    private fun validateAlreadyExists(date: LocalDate, themeId: Long, time: LocalTime) {
-        if (scheduleRepository.existsByDateAndThemeIdAndTime(date, themeId, time)) {
+    private fun validateAlreadyExists(storeId: Long, date: LocalDate, themeId: Long, time: LocalTime) {
+        if (scheduleRepository.existsDuplicate(storeId, date, themeId, time)) {
             log.info {
                 "[ScheduleValidator.validateAlreadyExists] 동일한 날짜, 테마, 시간 존재로 인한 실패: date=${date} / themeId=${themeId} / time=${time}"
             }
diff --git a/src/main/kotlin/roomescape/schedule/infrastructure/persistence/ScheduleRepository.kt b/src/main/kotlin/roomescape/schedule/infrastructure/persistence/ScheduleRepository.kt
index 1227edff..9fb8049f 100644
--- a/src/main/kotlin/roomescape/schedule/infrastructure/persistence/ScheduleRepository.kt
+++ b/src/main/kotlin/roomescape/schedule/infrastructure/persistence/ScheduleRepository.kt
@@ -8,7 +8,18 @@ import java.time.LocalTime
 
 interface ScheduleRepository : JpaRepository<ScheduleEntity, Long> {
 
-    fun existsByDateAndThemeIdAndTime(date: LocalDate, themeId: Long, time: LocalTime): Boolean
+    @Query("""
+        SELECT 
+            COUNT(s) > 0
+        FROM 
+            ScheduleEntity s
+        WHERE 
+            s.storeId = :storeId
+            AND s.date = :date
+            AND s.themeId = :themeId
+            AND s.time = :time
+    """)
+    fun existsDuplicate(storeId: Long, date: LocalDate, themeId: Long, time: LocalTime): Boolean
 
     @Query(
         """