Manganese, from several reputable sources:
-men generally absorb less manganese than women; this may be related to the fact that men usually have higher iron stores than women
-foods high in phytic acid, such as beans, seeds, nuts, whole grains, and soy products, or foods high in oxalic acid, such as cabbage, spinach, and sweet potatoes, may slightly inhibit manganese absorption.
-there has never been a case where manganese overdose occurred through foods alone
-the process of baking
So, given these factors and how the value is only 4mg above the max value, I think it’s safe to say that an actual bread has much lower manganese value than what you see in the table.