Fixed #1051: Bug - Trying to get property of non-object - Integrity constraint violation: 1062 Duplicate entry

    [feedquote='i-MSCP Github (stable) (nuxwin)','https://github.com/i-MSCP/imscp/commit/e26d7bf090fb0d48ae6d7fdfb0b8dde0a16cdab0']

    Code
    1. Fixed #1051: Bug - Trying to get property of non-object - Integrity constraint violation: 1062 Duplicate entry

    [/feedquote]