fix duplicate spring key

backend/src/main/resources/application.yml

@@ -38,6 +38,12 @@ spring:
         format_sql: true
     open-in-view: false
 
+  jackson:
+    serialization:
+      write-dates-as-timestamps: false
+    deserialization:
+      fail-on-unknown-properties: false
+
   flyway:
     enabled: ${FLYWAY_ENABLED:false}
 
@@ -92,10 +98,3 @@ logging:
     com.petshop: ${LOG_LEVEL:INFO}
     org.springframework.security: ${LOG_LEVEL_SECURITY:WARN}
     org.springdoc.core.events.SpringDocAppInitializer: ERROR
-
-spring:
-  jackson:
-    serialization:
-      write-dates-as-timestamps: false
-    deserialization:
-      fail-on-unknown-properties: false