diff --git a/backend/src/main/java/kr/momo/config/RoutingDataSource.java b/backend/src/main/java/kr/momo/config/RoutingDataSource.java
index 61610d8bd..54096002c 100644
--- a/backend/src/main/java/kr/momo/config/RoutingDataSource.java
+++ b/backend/src/main/java/kr/momo/config/RoutingDataSource.java
@@ -13,7 +13,7 @@ public class RoutingDataSource extends AbstractRoutingDataSource {
     protected Object determineCurrentLookupKey() {
         boolean currentTransactionReadOnly = TransactionSynchronizationManager.isCurrentTransactionReadOnly();
         String key = currentTransactionReadOnly ? DataSourceConfig.REPLICA_SERVER : DataSourceConfig.SOURCE_SERVER;
-        log.info("Activated Datasource: {}", key);
+        log.debug("Activated Datasource: {}", key);
         return key;
     }
 }
diff --git a/backend/src/main/java/kr/momo/controller/attendee/AttendeeController.java b/backend/src/main/java/kr/momo/controller/attendee/AttendeeController.java
index e7a496ea2..ae76baf74 100644
--- a/backend/src/main/java/kr/momo/controller/attendee/AttendeeController.java
+++ b/backend/src/main/java/kr/momo/controller/attendee/AttendeeController.java
@@ -50,12 +50,4 @@ public ResponseEntity<Void> logout(@PathVariable String uuid) {
     public MomoApiResponse<List<String>> findAttendeesOfMeeting(@PathVariable String uuid) {
         return new MomoApiResponse<>(attendeeService.findAll(uuid));
     }
-
-    /**
-     * TEMP: 비밀번호 마이그레이션 이후 삭제될 메서드입니다.
-     */
-    @PostMapping("/api/v1/attendee/update-password")
-    public MomoApiResponse<Integer> updatePassword() {
-        return new MomoApiResponse<>(attendeeService.updateAllPassword());
-    }
 }
diff --git a/backend/src/main/java/kr/momo/service/attendee/AttendeeService.java b/backend/src/main/java/kr/momo/service/attendee/AttendeeService.java
index 7effeb711..0795979e5 100644
--- a/backend/src/main/java/kr/momo/service/attendee/AttendeeService.java
+++ b/backend/src/main/java/kr/momo/service/attendee/AttendeeService.java
@@ -63,24 +63,4 @@ public List<String> findAll(String uuid) {
                 .map(Attendee::name)
                 .toList();
     }
-
-    /**
-     * TEMP: 비밀번호 마이그레이션 이후 삭제될 메서드입니다.
-     */
-    @Transactional
-    public Integer updateAllPassword() {
-        List<Attendee> attendees = attendeeRepository.findAll();
-        List<Attendee> rawAttendees = attendees.stream()
-                .filter(attendee -> attendee.getPassword().getPassword().length() < 15)
-                .toList();
-        rawAttendees.forEach(
-                attendee -> {
-                    String rawPassword = attendee.getPassword().getPassword();
-                    String encodedPassword = passwordEncoder.encode(rawPassword);
-                    attendee.updatePassword(encodedPassword);
-                }
-        );
-        attendeeRepository.saveAll(rawAttendees);
-        return rawAttendees.size();
-    }
 }
diff --git a/backend/src/main/resources/security b/backend/src/main/resources/security
index 45da7cf52..0a98e5e07 160000
--- a/backend/src/main/resources/security
+++ b/backend/src/main/resources/security
@@ -1 +1 @@
-Subproject commit 45da7cf5212cf5a9d95234bf83466b02862724ff
+Subproject commit 0a98e5e079296a8cb01d312c061dbbe2401bddf7