I'm currently unable to create items at all, since after import. I think a maintenance script is supposed to be run. Let me try explaining concisely;
After the import, there was no Q1, Q3, and Q15, so when I created the first item It was supposed to be Q1187 since that is the next number in line after Q1186 which is the very last ID of items on the wiki. when I tried creating the next item it showed an error that solely says "The item already exists", I was wondering why then I tried again then it worked which was now Q3 (because Q3 did not exist). The RC filter can tell you this.
I want the Item ID to start from Q1187 so that users can create an item.