[Typo3-shop] Error or QueryLog in ITEMDISPLAY and tt_products 2.2.15

[Thomas Janke]

Hello,

i have installed tt_products 2.2.15 on Typo3 3.7.0.
Everything work fine for me, but on the SINGLE ITEM DISPLAY PAGE i get 
an error or something like a query log.

$queryprev
a sql string
$querynext
a sql string

Can i switch off the messages in any way?

Thanks for your help in advance.

Greetings Thomas