diff --git a/src/main/java/icu/samnyan/aqua/sega/maimai2/handler/UpsertUserAllHandler.kt b/src/main/java/icu/samnyan/aqua/sega/maimai2/handler/UpsertUserAllHandler.kt
index acc2767f..9e742ea4 100644
--- a/src/main/java/icu/samnyan/aqua/sega/maimai2/handler/UpsertUserAllHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/maimai2/handler/UpsertUserAllHandler.kt
@@ -28,22 +28,12 @@ class UpsertUserAllHandler(
 ) : BaseHandler {
     fun String.isValidUsername() = isNotBlank() && length <= 8
 
-    // For preventing duplicates: {nonce: processed time}
-    val processed = mutableMapOf<Pair<Long, Long>, Long>()
-    fun cleanupProcessed() = processed.entries.removeIf { System.currentTimeMillis() - it.value > 5 * 60 * 1000 }
-
     @Throws(JacksonException::class)
     override fun handle(request: Map<String, Any>): Any? {
         val upsertUserAll = mapper.convert(request, Mai2UpsertUserAll::class.java)
         val userId = upsertUserAll.userId
         val req = upsertUserAll.upsertUserAll
 
-        // Check if the request has been processed before
-        val nonce = Pair(userId, upsertUserAll.loginDateTime)
-        if (processed.containsKey(nonce)) return SUCCESS
-        processed[nonce] = System.currentTimeMillis()
-        cleanupProcessed()
-
         // If user is guest, just return OK response.
         if ((userId and 281474976710657L) == 281474976710657L) return SUCCESS
 
diff --git a/src/main/java/icu/samnyan/aqua/sega/maimai2/model/request/Mai2UpsertUserAll.kt b/src/main/java/icu/samnyan/aqua/sega/maimai2/model/request/Mai2UpsertUserAll.kt
index 71bd457f..4e8916fe 100644
--- a/src/main/java/icu/samnyan/aqua/sega/maimai2/model/request/Mai2UpsertUserAll.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/maimai2/model/request/Mai2UpsertUserAll.kt
@@ -7,8 +7,6 @@ class Mai2UpsertUserAll(
     var userId: Long,
     var upsertUserAll: Mai2UserAll,
 
-    var loginDateTime: Long = 0, // Nonce, sort of
-
     var userPlaylogList: List<Mai2UserPlaylog>? = null, // SDGA 1.65 / SDGB 1.53
 )