Multivalue Control not allowing multi select

[fsmendoza14]

We have added a multivalue control to an existing picklist field so that we are able to select more than one item in the picklist drop down. This has been working fine until today when we attempt to add second item from the picklist it gives the error, “The field ‘Modules’ contains the value ‘[Value 1];{Value 2]’ that is not in the list of supported values.” In addition, when opening up a User Story or Bug that contains multiple values in the field it does not give the error unless trying to add a third value or changing the original two values to two new values.