CREATE TABLE table_49990 ("Exit Date" TEXT, "Pos." TEXT, "Player" TEXT, "To club" TEXT, "Transfer fee" TEXT)

What is the exit date of the player transferred to Reggina for free?
SELECT "Exit Date" FROM table_49990 WHERE "Transfer fee" = 'free' AND "To club" = 'reggina'
SELECT "Exit Date" FROM "table_49990" WHERE "To club" = 'reggina' AND "Transfer fee" = 'free'