Try tweaking busy timeout, a=chris

diff --git a/src/models/datasources/Sqlite3Manager.php b/src/models/datasources/Sqlite3Manager.php
index cae3eafad..741ef94c2 100644
--- a/src/models/datasources/Sqlite3Manager.php
+++ b/src/models/datasources/Sqlite3Manager.php
@@ -87,6 +87,7 @@ class Sqlite3Manager extends PdoManager
         $this->connect_string = "$db_host:$db_user:$db_password:$db_name";
         if (empty(self::$active_connections[$this->connect_string])) {
             $this->pdo = new \PDO($connect);
+            $this->pdo->exec("PRAGMA busy_timeout=30000");
         } else {
             $this->pdo = self::$active_connections[$this->connect_string];
         }