First of all one has to accept that Krishna is the Supreme personality Godhead. In the Bhagavad Gita Lord Krishna says to chant the holy name of Lord Rama because Rama is very Dear to Krishna and similarly Krishna is very Dear to Rama. The love of Krishna and Rama is eternal. If you have to love someone, take the example of Krishna and Rama.
The Hare Krishna mahamantra when chanted sometimes feels that Krishna’s name is coming first or sometimes Rama. Such is the beauty of this beautiful mantra.
So Krishna says always chant Rama name every single second. This is because Krishna’s pure love for Rama but Krishna forgets how can one chant every second. Khee khee khee… and Rama keeps saying to chant the holy name of Lord Hari every second. So there is a compromise in the Mahamantra between Krishna and Rama. How strange is this that both Krishna and Rama love each other so much that one is prepared to be a complete devotee of the other 😄😄😄. So wherever there is Krishna you will find Rama and where there is Rama you will find Krishna 😊😊😊
Om Madhusudan Namah/Om Ramachandraya Namaha