database – ERROR：function addgeometrycolumn不是唯一的

SELECT Assign_vertex_id('ways',0.00001,'the_geom','gid')

但由于某种原因,它给了我以下错误;

NOTICE:  CREATE TABLE will create implicit sequence "vertices_tmp_id_seq" for serial column "vertices_tmp.id"
CONTEXT:  SQL statement "CREATE TABLE vertices_tmp (id serial)"
PL/pgSQL function "assign_vertex_id" line 15 at EXECUTE statement
ERROR:  function addgeometrycolumn(unknown,unknown,integer,integer) is not unique
LINE 1: SELECT addGeometryColumn('vertices_tmp',4326,'...
               ^
HINT:  Could not choose a best candidate function. You might need to add explicit type casts.
QUERY:  SELECT addGeometryColumn('vertices_tmp','POINT',2)
CONTEXT:  PL/pgSQL function "assign_vertex_id" line 24 at EXECUTE statement

********** Error **********

ERROR: function addgeometrycolumn(unknown,integer) is not unique
SQL state: 42725
Hint: Could not choose a best candidate function. You might need to add explicit type casts.
Context: PL/pgSQL function "assign_vertex_id" line 24 at EXECUTE statement

现在从我发现它必须是旧的PostGIS签名周围.当我运行以下命令;

select proname,proargnames from pg_proc where proname = 'addgeometrycolumn';

结果是这样的;

pg_proc returns 6 rows.

Three rows with column proargnames  returning a blank or (null) value

有人能帮我吗？这与旧的postgis签名有什么关系吗？如果是的话,我该如何解决？

谢谢