Zerodha Mutual fund reinvest through lumpsum

Suppose I invest in mutual funds through zerodha coin.I buy SBI Blue Chip Fund - Direct Plan - Growth fund through lumpsum investing minimum rs 5000.Again i am mentioning that I am not invest through SIP. I am investing through lumpsum. After two months if I wish to invest rs 1000 more to the fund SBI Blue Chip Fund - Direct Plan - Growth is it possible? Or I have to again invest rs 5000 for SBI Blue Chip Fund - Direct Plan - Growth through lumpsum?

For the first time investor ₹5000/- has to be invested. From next time onwards you don’t require to invest more than or equal to ₹ 5000/-.