Session

Hello, I have the following problem in Yii2 basic with the use of dektrium: loguin a user opens the session. When login another user shows you the same session of the user who loguin before … I started recently to develop with Yii2, I finished the application and doing the tests I found this problem. I read the dektrium documentation, and look for information in forums, etc., but I can not find anything to guide me to solve the problem. Thank you very much for the help you can give me. regards