After checking i realize that the mistake was in the prefix format in xml file.
it should be something like this : TC/%(year)s/%(month)s/ but i made it like this : TC/%(year)s/%(month)s%/
So i fix the xml file and restart the odoo server, but it still got the same problem, even i tried to search it from google, i still cannot find the error :(, until i check into the databases it self through setting-technical-sequence I can see that there were two same sequence but the first was the error one, so after i deleted it, everything run smoothly :).
