diff --git a/data-otservbr-global/migrations/46.lua b/data-otservbr-global/migrations/46.lua
index 86a6d8ffec1..bdd0c851987 100644
--- a/data-otservbr-global/migrations/46.lua
+++ b/data-otservbr-global/migrations/46.lua
@@ -1,3 +1,31 @@
 function onUpdateDatabase()
-	return false -- true = There are others migrations file | false = this is the last migration file
+	logger.info("Updating database to version 52 (player forge history unique done_at)")
+
+	db.query([[
+		UPDATE forge_history
+		SET done_at = done_at * 1000
+		WHERE done_at < 1000000000000;
+	]])
+
+	db.query([[
+		UPDATE forge_history AS f1
+		JOIN (
+			SELECT
+				id,
+				done_at,
+				ROW_NUMBER() OVER (PARTITION BY done_at ORDER BY id) AS row_num
+			FROM forge_history
+		) AS duplicates ON f1.id = duplicates.id
+		SET f1.done_at = f1.done_at + (duplicates.row_num * 1)
+		WHERE duplicates.row_num > 1;
+	]])
+
+	local success = db.query("ALTER TABLE forge_history ADD UNIQUE KEY unique_done_at (done_at);")
+
+	if not success then
+		logger.error("Failed to add unique key to 'done_at'.")
+		return false
+	end
+
+	return true
 end
diff --git a/data-otservbr-global/migrations/47.lua b/data-otservbr-global/migrations/47.lua
new file mode 100644
index 00000000000..86a6d8ffec1
--- /dev/null
+++ b/data-otservbr-global/migrations/47.lua
@@ -0,0 +1,3 @@
+function onUpdateDatabase()
+	return false -- true = There are others migrations file | false = this is the last migration file
+end
diff --git a/schema.sql b/schema.sql
index d81c2914156..43180363baf 100644
--- a/schema.sql
+++ b/schema.sql
@@ -302,7 +302,7 @@ CREATE TABLE IF NOT EXISTS `daily_reward_history` (
         ON DELETE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
--- Tabble Structure `forge_history`
+-- Table Structure `forge_history`
 CREATE TABLE IF NOT EXISTS `forge_history` (
     `id` int NOT NULL AUTO_INCREMENT,
     `player_id` int NOT NULL,
@@ -314,7 +314,8 @@ CREATE TABLE IF NOT EXISTS `forge_history` (
     `done_at_date` datetime DEFAULT NOW(),
     `cost` bigint UNSIGNED NOT NULL DEFAULT '0',
     `gained` bigint UNSIGNED NOT NULL DEFAULT '0',
-    CONSTRAINT `forge_history_pk` PRIMARY KEY (`id`),
+    PRIMARY KEY (`id`),
+    UNIQUE KEY `unique_done_at` (`done_at`),
     FOREIGN KEY (`player_id`) REFERENCES `players` (`id`) ON DELETE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;