diff --git a/src/main/java/balancetalk/global/oauth2/service/CustomOAuth2UserService.java b/src/main/java/balancetalk/global/oauth2/service/CustomOAuth2UserService.java
index 9b05a7d51..af4bad147 100644
--- a/src/main/java/balancetalk/global/oauth2/service/CustomOAuth2UserService.java
+++ b/src/main/java/balancetalk/global/oauth2/service/CustomOAuth2UserService.java
@@ -45,7 +45,7 @@ public OAuth2User loadUser(OAuth2UserRequest userRequest) throws OAuth2Authentic
 
         String email = getEmail(oauth2Response);
         String provider = getProvider(oauth2Response);
-        Member findMember = memberRepository.findByEmail(email).orElse(null);
+        Member findMember = memberRepository.findByEmail(provider + "_" + email).orElse(null);
 
         if (findMember == null) {
             String encodedPassword = passwordEncoder().encode(oauth2Password);
diff --git a/src/main/java/balancetalk/talkpick/dto/TalkPickDto.java b/src/main/java/balancetalk/talkpick/dto/TalkPickDto.java
index e00c1b7d7..c371956e3 100644
--- a/src/main/java/balancetalk/talkpick/dto/TalkPickDto.java
+++ b/src/main/java/balancetalk/talkpick/dto/TalkPickDto.java
@@ -8,12 +8,15 @@
 import balancetalk.comment.domain.Comment;
 import balancetalk.member.domain.Member;
 import balancetalk.talkpick.domain.TalkPick;
+import balancetalk.talkpick.dto.fields.BaseTalkPickFields;
+import balancetalk.talkpick.dto.fields.ValidatedNotBlankTalkPickFields;
 import balancetalk.vote.domain.TalkPickVote;
 import balancetalk.vote.domain.VoteOption;
 import com.fasterxml.jackson.annotation.JsonFormat;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.querydsl.core.annotations.QueryProjection;
 import io.swagger.v3.oas.annotations.media.Schema;
+import jakarta.validation.Valid;
 import jakarta.validation.constraints.Size;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
@@ -29,7 +32,8 @@ public class TalkPickDto {
     @AllArgsConstructor
     public static class CreateTalkPickRequest {
 
-        private BaseTalkPickFields baseFields;
+        @Valid
+        private ValidatedNotBlankTalkPickFields baseFields;
 
         @Schema(description = "첨부한 이미지 파일 ID 목록", example = "[12, 41]")
         @Size(max = 10, message = "톡픽 생성 시 업로드할 수 있는 파일 개수는 최대 10개입니다.")
@@ -60,7 +64,8 @@ public boolean containsFileIds() {
     @AllArgsConstructor
     public static class UpdateTalkPickRequest {
 
-        private BaseTalkPickFields baseFields;
+        @Valid
+        private ValidatedNotBlankTalkPickFields baseFields;
 
         @Schema(description = "새로 첨부한 이미지 파일 ID 목록", example = "[12, 41]")
         @Size(max = 10, message = "톡픽 생성 시 업로드할 수 있는 파일 개수는 최대 10개입니다.")
diff --git a/src/main/java/balancetalk/talkpick/dto/TempTalkPickDto.java b/src/main/java/balancetalk/talkpick/dto/TempTalkPickDto.java
index aee5d5ddc..5fa1d3df5 100644
--- a/src/main/java/balancetalk/talkpick/dto/TempTalkPickDto.java
+++ b/src/main/java/balancetalk/talkpick/dto/TempTalkPickDto.java
@@ -2,8 +2,10 @@
 
 import balancetalk.member.domain.Member;
 import balancetalk.talkpick.domain.TempTalkPick;
+import balancetalk.talkpick.dto.fields.BaseTalkPickFields;
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import io.swagger.v3.oas.annotations.media.Schema;
+import jakarta.validation.Valid;
 import jakarta.validation.constraints.NotNull;
 import jakarta.validation.constraints.Size;
 import java.util.List;
@@ -18,7 +20,8 @@ public class TempTalkPickDto {
     @AllArgsConstructor
     public static class SaveTempTalkPickRequest {
 
-        private BaseTempTalkPickFields baseFields;
+        @Valid
+        private BaseTalkPickFields baseFields;
 
         @Schema(description = "새로 첨부한 이미지 파일 ID 목록", example = "[12, 41]")
         @Size(max = 10, message = "톡픽 생성 시 업로드할 수 있는 파일 개수는 최대 10개입니다.")
diff --git a/src/main/java/balancetalk/talkpick/dto/BaseTalkPickFields.java b/src/main/java/balancetalk/talkpick/dto/fields/BaseTalkPickFields.java
similarity index 92%
rename from src/main/java/balancetalk/talkpick/dto/BaseTalkPickFields.java
rename to src/main/java/balancetalk/talkpick/dto/fields/BaseTalkPickFields.java
index 439f2b57d..fb9be41e2 100644
--- a/src/main/java/balancetalk/talkpick/dto/BaseTalkPickFields.java
+++ b/src/main/java/balancetalk/talkpick/dto/fields/BaseTalkPickFields.java
@@ -1,4 +1,4 @@
-package balancetalk.talkpick.dto;
+package balancetalk.talkpick.dto.fields;
 
 import io.swagger.v3.oas.annotations.media.Schema;
 import jakarta.validation.constraints.Size;
@@ -16,6 +16,7 @@ public class BaseTalkPickFields {
     private String title;
 
     @Schema(description = "본문 내용", example = "본문 내용")
+    @Size(max = 2000, message = "본문은 2,000자 이하여야 합니다.")
     private String content;
 
     @Schema(description = "선택지 A 이름", example = "선택지 A 이름")
diff --git a/src/main/java/balancetalk/talkpick/dto/BaseTempTalkPickFields.java b/src/main/java/balancetalk/talkpick/dto/fields/ValidatedNotBlankTalkPickFields.java
similarity index 73%
rename from src/main/java/balancetalk/talkpick/dto/BaseTempTalkPickFields.java
rename to src/main/java/balancetalk/talkpick/dto/fields/ValidatedNotBlankTalkPickFields.java
index 4a9dfbd18..ff6b30cb6 100644
--- a/src/main/java/balancetalk/talkpick/dto/BaseTempTalkPickFields.java
+++ b/src/main/java/balancetalk/talkpick/dto/fields/ValidatedNotBlankTalkPickFields.java
@@ -1,10 +1,11 @@
-package balancetalk.talkpick.dto;
+package balancetalk.talkpick.dto.fields;
 
 import jakarta.validation.constraints.NotBlank;
 
-public class BaseTempTalkPickFields extends BaseTalkPickFields {
+public class ValidatedNotBlankTalkPickFields extends BaseTalkPickFields {
 
-    public BaseTempTalkPickFields(String title, String content, String optionA, String optionB, String sourceUrl) {
+    public ValidatedNotBlankTalkPickFields(String title, String content,
+                                           String optionA, String optionB, String sourceUrl) {
         super(title, content, optionA, optionB, sourceUrl);
     }