Since it comes from the bank, the bank must have sent that to you.  Unless you downloaded them and then disconnected/reconnected (that will bring in the duplicates.  Just click to select the copies and exclude them.  Then remove them from the excluded column to make them always be gone.

Resolution for 'bank must issue: 'How do I stop duplicate transactions being imported?' available: Yes.

The bank must issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the bank must issue yourself by looking for a resolution described in the article. If it is a complex bank must issue or you are unable to solve the issue, you may contact us by clicking here or by using other bank must support options.

For more information about resolving issues related to bank must in Quickbooks/QBO or to get support for the issue 'How do I stop duplicate transactions being imported?', click the link below: