Hi there, SERJGroup.
The Make a copy function will literally copy all information including the JE number. We're unable to change that.
On the other hand, I'm not sure if this is the report your team pulls up each day, but this is the easiest way to check the last JE number. On the Make General Journal Entries window, you can click the Reports tab and choose a range in the Entries entered drop list.
After knowing the last number, the you can click the Main tab and enter the next JE number.
Feel free to add a comment below if you have more questions.