conflict with another `parallel` command

Happened on lxplus:

+run:1> parallel ./example01 Ntuple01 -c example.info -f -j 2                  
Academic tradition requires you to cite works you base your article on.        
If you use programs that use GNU Parallel to process data for an article in a  
scientific publication, please cite:                                           
                                                                               
  Tange, O. (2024, September 22). GNU Parallel 20240922 ('Gold Apollo AR924'). 
  Zenodo. https://doi.org/10.5281/zenodo.13826092                              
                                                                               
This helps funding further development; AND IT WON'T COST YOU A CENT.          
If you pay 10000 EUR you should feel free to use GNU Parallel without citing.  
                                                                               
More about funding GNU Parallel and the citation notice:                       
https://www.gnu.org/software/parallel/parallel_design.html#citation-notice     
                                                                               
To silence this citation notice: run 'parallel --citation' once.               
                                                                               
parallel: Warning: Input is read from the terminal. You are either an expert   
parallel: Warning: (in which case: YOU ARE AWESOME!) or maybe you forgot       
parallel: Warning: ::: or :::: or -a or to pipe data into parallel. If so      
parallel: Warning: consider going through the tutorial: man parallel_tutorial  
parallel: Warning: Press CTRL-D to exit.