Lately a new problem occurs when using an article related field in a fieldx. It looks like this:

Table 'dbname.prefix_cck_store_join_introtext' doesn't exist SQL=DELETE 
a.* FROM prefix_cck_store_join_introtext AS a WHERE a.id = 7	

Storage of fieldx is: custom | article | introtext (default)

This problem occured within a fresh install of latest versions joomla and seblod. I already tried different things like change storage or recreate fields. The error shows in back- and frontend when saving the form. Everything is stored fine but redirection to error page makes it impossible to use.

I upgraded mySQL to version 5 a week ago. Could this be the reason for this? I never had this problem before...