Reduce reduce conflict

Consider the grammar M R+R | R+c | R

R c

and input c+c

Stack	input	action	Stack	input	action
	c+c	shift		c+c	shift
c	+c	reduce by R c	c	+c	reduce by R c
R	+c	shift	R	+c	shift
R+	c	shift	R+	c	shift
R+c		reduce by R c	R+c		reduce by M R+c
R+R		reduce by M R+R	M
M