diff --git a/src/database.erl b/src/database.erl
index a82bd27..3b86fcf 100644
--- a/src/database.erl
+++ b/src/database.erl
@@ -140,8 +140,10 @@ init_db(Database) ->
                                                      {type, text, [not_null]},
                                                      {number, integer, [not_null]},
                                                      {history, integer, [not_null]},
+                                                     {state, text, [not_null]},
                                                      {uuid, integer, [not_null]}],
                             [{primary_key, [division, type, number, history]},
+                             {check, "state in ('submitted', 'revoked')"},
                              % Restrict scores from being deleted that are referenced
                              {foreign_key, {[uuid],
                                             scores,
@@ -225,8 +227,10 @@ init_db(Database) ->
                                                        {number, integer, [not_null]},
                                                        {instance, integer, [not_null]},
                                                        {history, integer, [not_null]},
+                                                       {state, text, [not_null]},
                                                        {uuid, integer, [not_null]}],
                             [{primary_key, [division, number, instance, history]},
+                             {check, "state in ('submitted', 'revoked')"},
                              % Restrict scores from being deleted that are referenced
                              {foreign_key, {[uuid],
                                             scores,