Journal3 (Opencart) unique order ID for each new order

Job ID: 33301299

Budget: €30 – €250 EUR

Our eshop has a problem related with Journal theme used checkout page. Right after order, if customer uses Back button in browser and instantly makes a new order, instead of new order is created, previous order is overwritten with new order data using same order ID as before.
For example, client makes order #1234. Right after making order client goes back to our eshop and tries to order again different products. After he places an order, we want new order #1235 to be created but instead previous order #1234 is updated with new order data and all data from previous order positions is lost.
More discussion about issue at Opencart forums: https://forum.opencart.com/viewtopic.php?t=216892
Related categories: PHP JavaScript SQL eCommerce Open Cart