diff --git a/sql/create_tables/create_specific.sh b/sql/create_tables/create_specific.sh
index bdbf821..99a4272 100755
--- a/sql/create_tables/create_specific.sh
+++ b/sql/create_tables/create_specific.sh
@@ -1,3 +1,3 @@
-cat oastat_create_tables_common.sql | grep -v "RESTRICT2MYSQL" | sed -e 's/SERIAL/BIGSERIAL/g' -e 's/DATETIME/TIMESTAMP/g' > oastat_create_tables_posgrel.sql
-cat oastat_create_tables_common.sql | grep -v "RESTRICT2POSTGRESQL" | sed -e 's/PRIMARY KEY//g'  > oastat_create_tables_mysql.sql
+cat oastat_create_tables_common.sql | grep -v "RESTRICT2MYSQL" | sed -e 's/SERIAL/BIGSERIAL/g' -e 's/DATETIME/TIMESTAMP/g' -e 's/unsigned//g' > oastat_create_tables_posgrel.sql
+cat oastat_create_tables_common.sql | grep -v "RESTRICT2POSTGRESQL" | sed -e 's/PRIMARY KEY//g' -e 's/unique//g'  > oastat_create_tables_mysql.sql
 
diff --git a/sql/create_tables/oastat_create_tables_common.sql b/sql/create_tables/oastat_create_tables_common.sql
index d014952..1b46944 100644
--- a/sql/create_tables/oastat_create_tables_common.sql
+++ b/sql/create_tables/oastat_create_tables_common.sql
@@ -73,7 +73,7 @@ CREATE TABLE oastat_kills (
 
 CREATE TABLE oastat_players (
     guid character varying(64) NOT NULL,
-    playerid SERIAL NOT NULL,
+    playerid SERIAL unique NOT NULL, -- all small UNIQUE will be removed in mySQL, required for postgres
     lastseen DATETIME NOT NULL,
     isbot char(1) DEFAULT 'n' NOT NULL,
     model character varying(64) NOT NULL,