diff --git a/src/main/java/ext/Ext.kt b/src/main/java/ext/Ext.kt
index 0e095090..5c620d79 100644
--- a/src/main/java/ext/Ext.kt
+++ b/src/main/java/ext/Ext.kt
@@ -267,4 +267,4 @@ fun List<List<Any?>>.numCsv(vararg head: Str) = head.joinToString(",") + "\n" +
     joinToString("\n") { it.joinToString(",") }
 
 // DI
-inline fun <reified T> ApplicationContext.lazy() = lazy { getBean(T::class.java) }
\ No newline at end of file
+inline fun <reified T> ApplicationContext.lazy() = lazy { getBean(T::class.java) }
diff --git a/src/main/java/icu/samnyan/aqua/sega/general/model/CardTimestamp.kt b/src/main/java/icu/samnyan/aqua/sega/general/model/CardTimestamp.kt
index 31df69cd..9a64e3e8 100644
--- a/src/main/java/icu/samnyan/aqua/sega/general/model/CardTimestamp.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/general/model/CardTimestamp.kt
@@ -21,8 +21,8 @@ class CardTimestamp(
 
     var game: Str,
 
-    @OneToOne(fetch = FetchType.LAZY)
-    @JoinColumn(name = "card_id", unique = true)
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "card_id")
     var card: Card? = null,
 )