Update opencart

Hello,
I have try to update my opencart, but i recive an error.

SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data

OK

<br />
<b>Notice</b>: Undefined index: customer_activity_id in <b>/home/disoft1/public_html/install/model/upgrade/1001.php</b> on line <b>101</b><br />
{"error":"Error Code(0): Error: Unknown column 'customer_activity_id' in 'where clause'<br \/>Error No: 1054<br \/>UPDATE `oc_customer_activity` SET `data` = '{\\\"name\\\":\\\"\\\\u0414\\\\u0438\\\\u044f\\\\u043d \\\\u0413\\\\u0435\\\\u043e\\\\u0440\\\\u0433\\\\u0438\\\\u0435\\\\u0432\\\",\\\"order_id\\\":2}' WHERE `customer_activity_id` = '0' in \/home\/disoft1\/public_html\/system\/library\/db\/mysqli.php on line 40"}

More details are needed and you might want to have a look at http://bit.ly/2239rBb.

Which version are you starting with? It looks like you're trying to go to a 2.x version? The upgrade does not work beyond v1.5.6.4 right now but they are working on it. Do you have a backup that you can revert to in the meantime?