Attribute already exists error

[nmarkowitz]

Hi,

This is isn't a huge issue but this error gets printed when I read in a file that contains an AnnotatedEventsTable object. For example:

fname = 'Sample_VisLoc.nwb'
io = NWBHDF5IO(fname, 'r',load_namespaces=True)

/anaconda3/envs/ieeg/lib/python3.7/site-packages/hdmf/spec/namespace.py:470: UserWarning: ignoring namespace 'hdmf-common' because it already exists
  warn("ignoring namespace '%s' because it already exists" % ns['name'])
/anaconda3/envs/ieeg/lib/python3.7/site-packages/hdmf/spec/namespace.py:470: UserWarning: ignoring namespace 'core' because it already exists
  warn("ignoring namespace '%s' because it already exists" % ns['name'])
/anaconda3/envs/ieeg/lib/python3.7/site-packages/hdmf/common/table.py:410: UserWarning: An attribute 'event_times_index' already exists on AnnotatedEventsTable 'Events' so this column cannot be accessed as an attribute, e.g., table.event_times_index; it can only be accessed using other methods, e.g., table['event_times_index'].
  warn(msg)
/anaconda3/envs/ieeg/lib/python3.7/site-packages/hdmf/common/table.py:410: UserWarning: An attribute 'label' already exists on AnnotatedEventsTable 'Events' so this column cannot be accessed as an attribute, e.g., table.label; it can only be accessed using other methods, e.g., table['label'].
  warn(msg)
/anaconda3/envs/ieeg/lib/python3.7/site-packages/hdmf/common/table.py:410: UserWarning: An attribute 'event_description' already exists on AnnotatedEventsTable 'Events' so this column cannot be accessed as an attribute, e.g., table.event_description; it can only be accessed using other methods, e.g., table['event_description'].
  warn(msg)

I can still access all of my data but I'm unsure why this error is occurring and if anything incorrect is present. Running through pynwb validator it seems the file is fine. Any thoughts? Thank you for all the help and for this extension.

Noah