Is it ok to add a new language definition key ?

[abcart_ecm]

Hi,
I have this error message:
Language definition "default_weight_sort_order" is missing for "English"

So, I went to:
Admin => English => System => Localization => Language Definitions => English

In the key bar I entered default_weight to filter out with default_weight:

There appear to be only 4 keys with the part default_weight in it:
default_weight_name
default_weight_status
default_weight_autoselect
default_weight_accept_payments

It seems that the key "default_weight_sort_order" is not there at all !
So is it okay to add this key my self with + insert ?
I have never inserted a new key before, will it not cause conflicts in the database ?

[Basara]

Hi.

Backup first and add key. Also this is not an error but minor warning

[abcart_ecm]

Backup first and and key. Also this is not an error but minor warning

Ok yes you are right, warning and not error.
I will backup first and report back here later
when finished with weight_based_shipping.