Configurable InBasket - Error on Save

My company is using Aras Innovator 11.11. 

Following the Aras Innovator 11.0 - Configurable InBasket.pdf to the letter for adding a new column to existing InBasket PolySource ItemTypes (Workflow and Project), I get an error after adding the property to the Inbasket Task (parent) ItemType and clicking save.

I'm adding property called related_eco, Data Type = Item, Data Source = Express ECO. 

The error suggests I have an invalid column name, but I can't discern the cause of the error. Has anyone encountered this, or can anyone point out the probably obvious error I've made? Here's the error text (sorry, it's a long error):

Invalid column name 'related_eco'. Invalid column name 'related_eco'. in SQL: CREATE FUNCTION [secured].[INBASKET_TASK] ( @type VARCHAR(32), @identity_list VARCHAR(MAX), @ip_address VARCHAR(32), @cur_user_id CHAR(32), @perms_having_can_get NVARCHAR(MAX) ) RETURNS TABLE AS RETURN ( SELECT [secured].[PROJECT_TASK].assigned_to AS assigned_to, [secured].[PROJECT_TASK].classification AS classification, [secured].[PROJECT_TASK].config_id AS config_id, [secured].[PROJECT_TASK].container AS container, [secured].[PROJECT_TASK].container_type_id AS container_type_id, [secured].[PROJECT_TASK].created_by_id AS created_by_id, [secured].[PROJECT_TASK].created_on AS created_on, [secured].[PROJECT_TASK].css AS css, [secured].[PROJECT_TASK].current_state AS current_state, [secured].[PROJECT_TASK].due_date AS due_date, [secured].[PROJECT_TASK].generation AS generation, [secured].[PROJECT_TASK].icon AS icon, [secured].[PROJECT_TASK].id AS id, [secured].[PROJECT_TASK].instructions AS instructions, [secured].[PROJECT_TASK].is_current AS is_current, [secured].[PROJECT_TASK].is_released AS is_released, [secured].[PROJECT_TASK].item AS item, [secured].[PROJECT_TASK].item_type_id AS item_type_id, [secured].[PROJECT_TASK].keyed_name AS keyed_name, [secured].[PROJECT_TASK].language_code_filter AS language_code_filter, [secured].[PROJECT_TASK].locked_by_id AS locked_by_id, [secured].[PROJECT_TASK].major_rev AS major_rev, [secured].[PROJECT_TASK].managed_by_id AS managed_by_id, [secured].[PROJECT_TASK].minor_rev AS minor_rev, [secured].[PROJECT_TASK].modified_by_id AS modified_by_id, [secured].[PROJECT_TASK].modified_on AS modified_on, [secured].[PROJECT_TASK].my_assignment AS my_assignment, [secured].[PROJECT_TASK].name AS name, [secured].[PROJECT_TASK].new_version AS new_version, [secured].[PROJECT_TASK].not_lockable AS not_lockable, [secured].[PROJECT_TASK].owned_by_id AS owned_by_id, [secured].[PROJECT_TASK].permission_id AS permission_id, [secured].[PROJECT_TASK].related_eco AS related_eco, [secured].[PROJECT_TASK].start_date AS start_date, [secured].[PROJECT_TASK].state AS state, [secured].[PROJECT_TASK].status AS status, [secured].[PROJECT_TASK].team_id AS team_id, COALESCE ('9DC36DF7F0234A3E8CFFE2A20AB78CCE', NULL) AS ITEMTYPE,[secured].[PROJECT_TASK].id_$_permission AS id_$_permission FROM [secured].[PROJECT_TASK](@type, @identity_list, @ip_address, @cur_user_id, @perms_having_can_get) UNION ALL SELECT [secured].[WORKFLOW_TASK].assigned_to AS assigned_to, [secured].[WORKFLOW_TASK].classification AS classification, [secured].[WORKFLOW_TASK].config_id AS config_id, [secured].[WORKFLOW_TASK].container AS container, [secured].[WORKFLOW_TASK].container_type_id AS container_type_id, [secured].[WORKFLOW_TASK].created_by_id AS created_by_id, [secured].[WORKFLOW_TASK].created_on AS created_on, [secured].[WORKFLOW_TASK].css AS css, [secured].[WORKFLOW_TASK].current_state AS current_state, [secured].[WORKFLOW_TASK].due_date AS due_date, [secured].[WORKFLOW_TASK].generation AS generation, [secured].[WORKFLOW_TASK].icon AS icon, [secured].[WORKFLOW_TASK].id AS id, [secured].[WORKFLOW_TASK].instructions AS instructions, [secured].[WORKFLOW_TASK].is_current AS is_current, [secured].[WORKFLOW_TASK].is_released AS is_released, [secured].[WORKFLOW_TASK].item AS item, [secured].[WORKFLOW_TASK].item_type_id AS item_type_id, [secured].[WORKFLOW_TASK].keyed_name AS keyed_name, [secured].[WORKFLOW_TASK].language_code_filter AS language_code_filter, [secured].[WORKFLOW_TASK].locked_by_id AS locked_by_id, [secured].[WORKFLOW_TASK].major_rev AS major_rev, [secured].[WORKFLOW_TASK].managed_by_id AS managed_by_id, [secured].[WORKFLOW_TASK].minor_rev AS minor_rev, [secured].[WORKFLOW_TASK].modified_by_id AS modified_by_id, [secured].[WORKFLOW_TASK].modified_on AS modified_on, [secured].[WORKFLOW_TASK].my_assignment AS my_assignment, [secured].[WORKFLOW_TASK].name AS name, [secured].[WORKFLOW_TASK].new_version AS new_version, [secured].[WORKFLOW_TASK].not_lockable AS not_lockable, [secured].[WORKFLOW_TASK].owned_by_id AS owned_by_id, [secured].[WORKFLOW_TASK].permission_id AS permission_id, [secured].[WORKFLOW_TASK].related_eco AS related_eco, [secured].[WORKFLOW_TASK].start_date AS start_date, [secured].[WORKFLOW_TASK].state AS state, [secured].[WORKFLOW_TASK].status AS status, [secured].[WORKFLOW_TASK].team_id AS team_id, COALESCE ('321BD822949149C597FD596B1212B85C', NULL) AS ITEMTYPE,[secured].[WORKFLOW_TASK].id_$_permission AS id_$_permission FROM [secured].[WORKFLOW_TASK](@type, @identity_list, @ip_address, @cur_user_id, @perms_having_can_get) )