Meaning of PERSONNEL in English
BAD : Her books deal mainly with personnel relationships, especially marital problems.
GOOD : Her books deal mainly with personal relationships, especially marital problems.
personal (adjective) = concerning or belonging to one person in particular; individual or private: 'The novel is based on the author's own personal experience.' 'Our bank manager assured us that she would give the matter her personal attention.'
personnel (noun) = all the people employed in a company, office etc: 'In the event of a fire, all personnel must report to the reception area.' 'The personnel officer wants you to call and arrange an interview.'
Longman Common Errors English vocabulary. Английский словарь распространенных ошибок Longman. 2012