XML feed for Google Merchant Center - feed

Question

Hy all,
I want to create a feed that matches GMC specifications.
The feed i created is:
https://www.kitisimo.ro/feed/feed-google-local-inventory.xml
` <item>
<g:id>c1</g:id>
<g:quantity>1</g:quantity>
<g:price>75</g:price>
<g:store_code>12169613935259656004</g:store_code>
</item> `
As you can see there is no
`[CDATA]`
in the id string
However, when processed by GMC the feed looks like this:
` <item>
<g:id>
<![CDATA[ c1 ]]>
</g:id>
<g:quantity>1</g:quantity>
<g:price>75</g:price>
<g:store_code>12169613935259656004</g:store_code>
<g:sale_price>0</g:sale_price>
</item> `
and i have the "Invalid or missing required attribute: store code" error.
I asked google support and this is the reply:
"After checking the feed, I was able to verify that the store code is available. Checking the item ID: c3 which has a store code: 12169613935259656004 from the feed, our final attribute was not able to capture the store code. After further investigation, I noticed that your Item ID from your xml feed <g:id><![CDATA[ c3 ]]></g:id>
type here
. Based on our formatting guide for item ID, it should be <g:id>c3</g:id> "
Does anyone has an idea on how to proceed to prevent
`[CDATA]`
from appearing in GMC feed?
I tried to create a feed according to GMC specs.
I am expecting some help regarding the matter.