CO: Fix for mysql duplicated id for guest account registration - guest is duplicated if it has multiple customer accounts

[fkwakkenbos]

Fix for a situation when a new registration as Guest occurs for someone who has already a Guest account registered. You've got a MySQL error for a duplicated ID because it tries to create a new guest record with the same id.

[sarahdib]

@fkwakkenbos

Thanks for your contribution.

In order to reproduce the issue could you tell us where the mysql error appear ?
And in order to test this PR could you give us a test case scenario ?

Thank you

[fkwakkenbos]

I'm not completely sure, but as far as i can see it happens when you create a guest account and leave it that way.
Then you create a new guest account, while having the current guest account cookie active (id_guest).
In normal situations this is not possible, but when you have a custom PrestaShop Theme, this may be possible.

[sarahdib]

@fkwakkenbos
If I understand the steps is :

1. create a guest customer in the FO
2. Then I create a second time another customer guest with the same email ?

And that happen only with other template.

[fkwakkenbos]

@sarahdib

Yes the steps are (not 100% sure):

1. Create a guest customer in the FO
2. Then I create a second time another customer guest with the same email ? (this should be only possible if the FO Theme allows this behaviour

[sarahdib]

@fkwakkenbos

since I can't reproduce the issue I made some non-reg test and it seems ok for me.

[Progi1984]

Thanks @fkwakkenbos