Bison shift/reduce conflict in "else"

Question

Consider the following grammar:

%start stmt;
%right "else";

stmt: "foo"
   | "if" "(" exp ")" stmt
   | "if" "(" exp ")" stmt "else" stmt 

exp: "foo2"

On running bison (with producing counter examples) I get:

parser.yy: warning: 1 shift/reduce conflict [-Wconflicts-sr]
parser.yy: warning: shift/reduce conflict on token "else" [-Wcounterexamples]
  Example: "if" "(" exp ")" "if" "(" exp ")" stmt • "else" stmt
  Shift derivation
    stmt
    ↳ 2: "if" "(" exp ")" stmt
                          ↳ 3: "if" "(" exp ")" stmt • "else" stmt
  Reduce derivation
    stmt
    ↳ 3: "if" "(" exp ")" stmt                         "else" stmt
                          ↳ 2: "if" "(" exp ")" stmt •

This is somehow the shift/reduce represented in bison's manual here. But I don't have "then" after this grammar. The manual says that this problems can be solved defining left and right associativity and precedence. At above I've defined right associativity for "else" but it has no effect on this shift reduce problem.
I don't want to suppress the warning by shift/reduce counts since it is too dangerous because my grammar is too big.
What can I do ?