diff --git a/growthookServer/src/main/java/com/example/growthookserver/api/seed/dto/request/SeedCreateRequestDto.java b/growthookServer/src/main/java/com/example/growthookserver/api/seed/dto/request/SeedCreateRequestDto.java
index c18fee5..22878c6 100644
--- a/growthookServer/src/main/java/com/example/growthookserver/api/seed/dto/request/SeedCreateRequestDto.java
+++ b/growthookServer/src/main/java/com/example/growthookserver/api/seed/dto/request/SeedCreateRequestDto.java
@@ -19,7 +19,6 @@ public class SeedCreateRequestDto {
   @Size(max = 300)
   private String memo;
 
-  @NotBlank
   @Size(max = 20)
   private String source;
 
diff --git a/growthookServer/src/main/java/com/example/growthookserver/api/seed/dto/request/SeedUpdateRequestDto.java b/growthookServer/src/main/java/com/example/growthookserver/api/seed/dto/request/SeedUpdateRequestDto.java
index f108651..68dba1c 100644
--- a/growthookServer/src/main/java/com/example/growthookserver/api/seed/dto/request/SeedUpdateRequestDto.java
+++ b/growthookServer/src/main/java/com/example/growthookserver/api/seed/dto/request/SeedUpdateRequestDto.java
@@ -18,7 +18,6 @@ public class SeedUpdateRequestDto {
     @Size(max = 300)
     private String memo;
 
-    @NotBlank
     @Size(max = 20)
     private String source;
 
diff --git a/growthookServer/src/main/java/com/example/growthookserver/api/seed/service/Impl/SeedServiceImpl.java b/growthookServer/src/main/java/com/example/growthookserver/api/seed/service/Impl/SeedServiceImpl.java
index 9a108d2..c5d9e60 100644
--- a/growthookServer/src/main/java/com/example/growthookserver/api/seed/service/Impl/SeedServiceImpl.java
+++ b/growthookServer/src/main/java/com/example/growthookserver/api/seed/service/Impl/SeedServiceImpl.java
@@ -20,6 +20,9 @@
 import java.time.Clock;
 import java.util.List;
 import java.util.stream.Collectors;
+
+import com.example.growthookserver.common.exception.BadRequestException;
+import com.example.growthookserver.common.response.ErrorStatus;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -125,10 +128,12 @@ public SeedAlarmGetResponseDto getSeedAlarm(Long memberId) {
   @Transactional
   public void unlockSeed(Long seedId) {
     Seed seed = seedRepository.findSeedByIdOrThrow(seedId);
-    seed.unlockSeed();
+    Member member = memberRepository.findMemberByIdOrThrow(seed.getMemberId());
 
-    Long memberId = seed.getMemberId();
-    Member member = memberRepository.findMemberByIdOrThrow(memberId);
+    if(member.getGatheredSsuk()==0)
+      throw new BadRequestException(ErrorStatus.USER_GATHEREDSSUK_ZERO.getMessage());
+
+    seed.unlockSeed();
     member.useSsuck();
   }
 
diff --git a/growthookServer/src/main/java/com/example/growthookserver/common/response/ErrorStatus.java b/growthookServer/src/main/java/com/example/growthookserver/common/response/ErrorStatus.java
index 8c79e44..a10f52b 100644
--- a/growthookServer/src/main/java/com/example/growthookserver/common/response/ErrorStatus.java
+++ b/growthookServer/src/main/java/com/example/growthookserver/common/response/ErrorStatus.java
@@ -17,6 +17,7 @@ public enum ErrorStatus {
     INVALID_MEMBER("유효하지 않은 유저입니다."),
     ANOTHER_ACCESS_TOKEN("지원하지 않는 소셜 플랫폼입니다."),
     ALREADY_COMPLETE_ACTIONPLAN("이미 완료된 액션 플랜입니다."),
+    USER_GATHEREDSSUK_ZERO("해당 유저의 쑥이 0개입니다."),
 
     /**
      * 401 UNAUTHORIZED
diff --git a/growthookServer/src/main/java/com/example/growthookserver/external/slack/service/SlackService.java b/growthookServer/src/main/java/com/example/growthookserver/external/slack/service/SlackService.java
index 792b6e6..a1dc43f 100644
--- a/growthookServer/src/main/java/com/example/growthookserver/external/slack/service/SlackService.java
+++ b/growthookServer/src/main/java/com/example/growthookserver/external/slack/service/SlackService.java
@@ -17,7 +17,7 @@ public class SlackService {
     String slackToken;
 
     public void sendSlackMessage(String userName, Long totalMember, String channel) {
-        String message = userName +"님은 " + totalMember.toString() + "번째 쑥쑥이에어 곰이 됐어요.";
+        String message = userName +"님은 " + totalMember.toString() + "번째 쑥쑥이에서 곰이 됐어요.";
         try {
             MethodsClient methods = Slack.getInstance().methods(slackToken);