I can't assign a workflow access configuration to my workflow.

Hi,
I have created my workflow, composed by four states. It's work normaly. So, by the configuration of the current workflow, I have also, configured the Organic Group Workflow. Up to now, it's ok. But, when I tried to configure the workflow access, I have encountered a problem of "Integrity constraint violation".
Knowing that, without the module Workflow access, it works normally.
So, if you have any idea about how to solve this error, try to post it:

PDOException :SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '12-2-workflow_access' for key 'PRIMARY': INSERT INTO {node_access} (nid, realm, gid, grant_view, grant_update, grant_delete) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5), (:db_insert_placeholder_6, :db_insert_placeholder_7, :db_insert_placeholder_8, :db_insert_placeholder_9, :db_insert_placeholder_10, :db_insert_placeholder_11), (:db_insert_placeholder_12, :db_insert_placeholder_13, :db_insert_placeholder_14, :db_insert_placeholder_15, :db_insert_placeholder_16, :db_insert_placeholder_17), (:db_insert_placeholder_18, :db_insert_placeholder_19, :db_insert_placeholder_20, :db_insert_placeholder_21, :db_insert_placeholder_22, :db_insert_placeholder_23), (:db_insert_placeholder_24, :db_insert_placeholder_25, :db_insert_placeholder_26, :db_insert_placeholder_27, :db_insert_placeholder_28, :db_insert_placeholder_29), (:db_insert_placeholder_30, :db_insert_placeholder_31, :db_insert_placeholder_32, :db_insert_placeholder_33, :db_insert_placeholder_34, :db_insert_placeholder_35), (:db_insert_placeholder_36, :db_insert_placeholder_37, :db_insert_placeholder_38, :db_insert_placeholder_39, :db_insert_placeholder_40, :db_insert_placeholder_41), (:db_insert_placeholder_42, :db_insert_placeholder_43, :db_insert_placeholder_44, :db_insert_placeholder_45, :db_insert_placeholder_46, :db_insert_placeholder_47), (:db_insert_placeholder_48, :db_insert_placeholder_49, :db_insert_placeholder_50, :db_insert_placeholder_51, :db_insert_placeholder_52, :db_insert_placeholder_53), (:db_insert_placeholder_54, :db_insert_placeholder_55, :db_insert_placeholder_56, :db_insert_placeholder_57, :db_insert_placeholder_58, :db_insert_placeholder_59), (:db_insert_placeholder_60, :db_insert_placeholder_61, :db_insert_placeholder_62, :db_insert_placeholder_63, :db_insert_placeholder_64, :db_insert_placeholder_65); Array ( [:db_insert_placeholder_0] => 12 [:db_insert_placeholder_1] => workflow_access [:db_insert_placeholder_2] => 2 [:db_insert_placeholder_3] => 1 [:db_insert_placeholder_4] => 0 [:db_insert_placeholder_5] => 0 [:db_insert_placeholder_6] => 12 [:db_insert_placeholder_7] => workflow_access [:db_insert_placeholder_8] => 4 [:db_insert_placeholder_9] => 0 [:db_insert_placeholder_10] => 1 [:db_insert_placeholder_11] => 0 [:db_insert_placeholder_12] => 12 [:db_insert_placeholder_13] => workflow_access [:db_insert_placeholder_14] => 5 [:db_insert_placeholder_15] => 0 [:db_insert_placeholder_16] => 1 [:db_insert_placeholder_17] => 0 [:db_insert_placeholder_18] => 12 [:db_insert_placeholder_19] => workflow_access [:db_insert_placeholder_20] => 6 [:db_insert_placeholder_21] => 0 [:db_insert_placeholder_22] => 1 [:db_insert_placeholder_23] => 0 [:db_insert_placeholder_24] => 12 [:db_insert_placeholder_25] => workflow_access [:db_insert_placeholder_26] => 7 [:db_insert_placeholder_27] => 0 [:db_insert_placeholder_28] => 1 [:db_insert_placeholder_29] => 0 [:db_insert_placeholder_30] => 12 [:db_insert_placeholder_31] => workflow_access [:db_insert_placeholder_32] => 8 [:db_insert_placeholder_33] => 0 [:db_insert_placeholder_34] => 1 [:db_insert_placeholder_35] => 0 [:db_insert_placeholder_36] => 12 [:db_insert_placeholder_37] => workflow_access [:db_insert_placeholder_38] => 9 [:db_insert_placeholder_39] => 0 [:db_insert_placeholder_40] => 1 [:db_insert_placeholder_41] => 0 [:db_insert_placeholder_42] => 12 [:db_insert_placeholder_43] => workflow_access [:db_insert_placeholder_44] => 10 [:db_insert_placeholder_45] => 0 [:db_insert_placeholder_46] => 1 [:db_insert_placeholder_47] => 0 [:db_insert_placeholder_48] => 12 [:db_insert_placeholder_49] => workflow_access [:db_insert_placeholder_50] => 11 [:db_insert_placeholder_51] => 0 [:db_insert_placeholder_52] => 1 [:db_insert_placeholder_53] => 0 [:db_insert_placeholder_54] => 12 [:db_insert_placeholder_55] => workflow_access [:db_insert_placeholder_56] => 12 [:db_insert_placeholder_57] => 0 [:db_insert_placeholder_58] => 1 [:db_insert_placeholder_59] => 0 [:db_insert_placeholder_60] => 12 [:db_insert_placeholder_61] => workflow_access [:db_insert_placeholder_62] => 13 [:db_insert_placeholder_63] => 0 [:db_insert_placeholder_64] => 1 [:db_insert_placeholder_65] => 0 ) في node_access_write_grants() (line 3426 in /var/www/web_site/modules/node/node.module).

best regards,