ERRORS DURING UPDATE

I am a newbie and I just installed XAMPserver and Projeqtor.
The first time I enter the site, after filling all the configuration fields, it asks for admin password and says that it is upgrading to V7.4.3. But then it shows the error 2506 ERRORS DURING UPDATE TO VERSION V7.4.3
Looking at the log it shows contradictory errors like:
***** ERROR ***** [] Exception-[42S01] SQLSTATE[42S01]: Base table or view already exists: 1050 Table '`projeqtor`.`accessright`' already exists
and after that
***** ERROR ***** [] Exception-[42S02] SQLSTATE[42S02]: Base table or view not found: 1146 Table 'projeqtor.accessright' doesn't exist

Attached is the log that was generated

What am I doing wrong?

I am using MySQL 5.7.24
I decided to clean everything and reinstall all. The first time that I reinstalled the error remained. But on the second time I reinstalled it, the problem disappeared.
So the problem was solved but I don't know why and how
Thank you