diff --git a/src/main/kotlin/kr/co/vividnext/sodalive/admin/chat/calculate/AdminChatCalculateQueryRepository.kt b/src/main/kotlin/kr/co/vividnext/sodalive/admin/chat/calculate/AdminChatCalculateQueryRepository.kt
index 3eecc5e..defc36b 100644
--- a/src/main/kotlin/kr/co/vividnext/sodalive/admin/chat/calculate/AdminChatCalculateQueryRepository.kt
+++ b/src/main/kotlin/kr/co/vividnext/sodalive/admin/chat/calculate/AdminChatCalculateQueryRepository.kt
@@ -2,6 +2,7 @@ package kr.co.vividnext.sodalive.admin.chat.calculate
 
 import com.querydsl.core.types.Projections
 import com.querydsl.core.types.dsl.CaseBuilder
+import com.querydsl.core.types.dsl.Expressions
 import com.querydsl.jpa.impl.JPAQueryFactory
 import kr.co.vividnext.sodalive.can.use.CanUsage
 import kr.co.vividnext.sodalive.can.use.QUseCan.useCan
@@ -50,16 +51,25 @@ class AdminChatCalculateQueryRepository(
         val c2 = QChatCharacter("c2")
 
         val characterIdExpr = c1.id.coalesce(c2.id)
-        val characterNameExpr = c1.name.coalesce(c2.name)
-        val characterImagePathExpr = c1.imagePath.coalesce(c2.imagePath)
+        // ONLY_FULL_GROUP_BY 대응: name/imagePath는 집계 함수로 선택
+        val characterNameAgg = Expressions.stringTemplate(
+            "coalesce(max({0}), max({1}))",
+            c1.name,
+            c2.name
+        )
+        val characterImagePathAgg = Expressions.stringTemplate(
+            "coalesce(max({0}), max({1}))",
+            c1.imagePath,
+            c2.imagePath
+        )
 
         val query = queryFactory
             .select(
                 Projections.constructor(
                     ChatCharacterCalculateQueryData::class.java,
                     characterIdExpr,
-                    characterNameExpr,
-                    characterImagePathExpr.prepend("/").prepend(imageHost),
+                    characterNameAgg,
+                    characterImagePathAgg.prepend("/").prepend(imageHost),
                     imageSum,
                     messageSum,
                     quotaSum
@@ -81,7 +91,7 @@ class AdminChatCalculateQueryRepository(
                     .and(useCan.createdAt.goe(startUtc))
                     .and(useCan.createdAt.loe(endInclusiveUtc))
             )
-            .groupBy(characterIdExpr, characterNameExpr, characterImagePathExpr)
+            .groupBy(characterIdExpr)
 
         when (sort) {
             ChatCharacterCalculateSort.TOTAL_SALES_DESC ->