Mod_python error: "PythonHandler website"

Traceback (most recent call last):

  File "/usr/local/lib/python3.8/site-packages/mod_python/apache.py", line 402, in HandlerDispatch
    result = obj(req)

  File "/usr/local/www/apache24/data/www.wolf-fashion.be/website.py", line 32, in handler
    resp = merkdetail(req,session,args,parts[1])

  File "/usr/local/www/apache24/data/www.wolf-fashion.be/website.py", line 123, in merkdetail
    maindic["merk"] = merk = db.dosqln_dict2("select id,merk,info,logomd5 from cmsmerken where nieuwpoort=true and lower(replace(merk,' ','_'))=%s", [merk], mdb)[0]

IndexError: list index out of range