diff --git a/backend/src/api/database-migration.ts b/backend/src/api/database-migration.ts
index f1d68c621..df5091701 100644
--- a/backend/src/api/database-migration.ts
+++ b/backend/src/api/database-migration.ts
@@ -652,11 +652,6 @@ class DatabaseMigration {
       await this.$executeQuery('ALTER TABLE `prices` ADD `THB` float DEFAULT "-1"');
       await this.$executeQuery('ALTER TABLE `prices` ADD `TRY` float DEFAULT "-1"');
       await this.$executeQuery('ALTER TABLE `prices` ADD `ZAR` float DEFAULT "-1"');
-
-      await this.$executeQuery('TRUNCATE hashrates');
-      await this.$executeQuery('TRUNCATE difficulty_adjustments');
-      await this.$executeQuery(`UPDATE state SET string = NULL WHERE name = 'pools_json_sha'`);
-
       await this.updateToSchemaVersion(75);
     }