I have a Magento store with more than 5k customers.
I am facing a problem when a customer log in to their account. The customer's name that appear keep changing to other customer's name. The price he/she see also keep changing. (please refer to the picture attached)
I just newly move to Magento and I move the customer contacts from old website by importing via CSV.
I would like to solve the this error as soon as possible.