diff --git a/install_minimal/upgrades/airtime-2.5.2/data/upgrade.sql b/install_minimal/upgrades/airtime-2.5.2/data/upgrade.sql
index 6341965f3..3a4f35e05 100644
--- a/install_minimal/upgrades/airtime-2.5.2/data/upgrade.sql
+++ b/install_minimal/upgrades/airtime-2.5.2/data/upgrade.sql
@@ -1,6 +1,3 @@
-DELETE FROM cc_pref WHERE keystr = 'system_version';
-INSERT INTO cc_pref (keystr, valstr) VALUES ('system_version', '2.5.2');
-
 INSERT INTO cc_locale (locale_code, locale_lang) VALUES ('hr_HR', 'Hrvatski');
 INSERT INTO cc_locale (locale_code, locale_lang) VALUES ('sr_RS', 'Српски (Ћирилица)');
 INSERT INTO cc_locale (locale_code, locale_lang) VALUES ('sr_RS@latin', 'Srpski (Latinica)');