I have created a new drupal site and first added a few nodes using native create content method. I then run a custom SQL statement on the drupal database directly for adding extra nodes. I modified node table, term_node table as well as sequence table. After the exercise, I tried to add new nodes using native create content method again. The problem arised here. When I click the submit button, it reported "Duplicate entry". It appears that drupal cannot recognized my new nodes which are created by custom SQL statement. I've read the other posts which suggested that the sequence table needs to be modified to reflect the new node count. I did that and still encountered the same error. Any one can suggestion what went wrong and what shall I do to overcome this?
Thanks a lot.