When you imported the zc154 data into the zc158a database did you run zc_install to update the database structure to 158a and check each upgrade step was completed successfully without error?

Are you working on a clean install of zc158a files or have you copied some of the old zc154 files over to the new installation that you are working on?

Without seeing your installation the steps I would take are:
Remove all old printable-pricelist files from the test setup
Import the zc154 data into the test zc158a installation
Run zc_install to update the database to zc158a
Resolve any issues shown in the debug files
Use the sql script in phpmyadmin to delete the "PL_" references in the configuration table. Check that all the values have been removed and that there are no errors.
copy the new zc158 files for printable-pricelist to the correct structure in zc158a
open the admin console and check that all is working as expected.