diff --git a/src/main/java/de/diddiz/LogBlock/Updater.java b/src/main/java/de/diddiz/LogBlock/Updater.java
index 195af4f..4c0fb2d 100644
--- a/src/main/java/de/diddiz/LogBlock/Updater.java
+++ b/src/main/java/de/diddiz/LogBlock/Updater.java
@@ -243,7 +243,7 @@ class Updater
 				final Statement st = conn.createStatement();
 				for (final WorldConfig wcfg : getLoggedWorlds()) {
 					if (wcfg.isLogging(Logging.CHESTACCESS)) {
-						st.execute("ALTER TABLE `"+wcfg.table+"-chest` CHANGE itemdata itemdata SMALLINT UNSIGNED NOT NULL");
+						st.execute("ALTER TABLE `"+wcfg.table+"-chest` CHANGE itemdata itemdata SMALLINT NOT NULL");
 						getLogger().info("Table "+wcfg.table+"-chest modified");
 					}
 				}
@@ -277,7 +277,7 @@ class Updater
 		for (final WorldConfig wcfg : getLoggedWorlds()) {
 			createTable(dbm, state, wcfg.table, "(id INT UNSIGNED NOT NULL AUTO_INCREMENT, date DATETIME NOT NULL, playerid INT UNSIGNED NOT NULL, replaced TINYINT UNSIGNED NOT NULL, type TINYINT UNSIGNED NOT NULL, data TINYINT UNSIGNED NOT NULL, x MEDIUMINT NOT NULL, y SMALLINT UNSIGNED NOT NULL, z MEDIUMINT NOT NULL, PRIMARY KEY (id), KEY coords (x, z, y), KEY date (date), KEY playerid (playerid))");
 			createTable(dbm, state, wcfg.table + "-sign", "(id INT UNSIGNED NOT NULL, signtext VARCHAR(255) NOT NULL, PRIMARY KEY (id)) DEFAULT CHARSET utf8");
-			createTable(dbm, state, wcfg.table + "-chest", "(id INT UNSIGNED NOT NULL, itemtype SMALLINT UNSIGNED NOT NULL, itemamount SMALLINT NOT NULL, itemdata SMALLINT UNSIGNED NOT NULL, PRIMARY KEY (id))");
+			createTable(dbm, state, wcfg.table + "-chest", "(id INT UNSIGNED NOT NULL, itemtype SMALLINT UNSIGNED NOT NULL, itemamount SMALLINT NOT NULL, itemdata SMALLINT NOT NULL, PRIMARY KEY (id))");
 			if (wcfg.isLogging(Logging.KILL))
 				createTable(dbm, state, wcfg.table + "-kills", "(id INT UNSIGNED NOT NULL AUTO_INCREMENT, date DATETIME NOT NULL, killer INT UNSIGNED, victim INT UNSIGNED NOT NULL, weapon SMALLINT UNSIGNED NOT NULL, x MEDIUMINT NOT NULL, y SMALLINT NOT NULL, z MEDIUMINT NOT NULL, PRIMARY KEY (id))");
 		}