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Out of the blue my application starts to send this message at login :

Question2Answer fatal error:

External login mapped to more than one user

Stack trace:

require() in index.php:27
require() in qa-index.php:183
qa_check_login_modules() in qa-page.php:829
check_login() in qa-page.php:101
qa_log_in_external_user() in ldap-login.php:33

Version 1.7.2

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