Always specify the schema prefix when creating stored procedures. This way you know that it will always be dbo.procedure_name no matter who is logged in when it is created.
There are 2 other benefits to including the schema prefix on all object references:
Aaron Bertrand agrees with this rule - My stored procedure "best practices" checklist.
CREATE PROCEDURE procCustomer_Update @CustomerID INT, ….. BEGIN
❌ Figure: Bad example
CREATE PROCEDURE dbo.procCustomer_Update @CustomerID INT, ….. BEGIN
✅ Figure: Good example