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A GROUP BY expression must contain at least one column that is not an external reference

There are several posts in the same topic, and I read them ... but I try as best I can, I can not apply them to my problem. I'm sure this is something dumb that I'm missing.

What I'm trying to do is show patients who were in bed on a specific day and time. Each patient has a date of admission and discharge, so I use them to determine if they were in bed at that particular date and time. If I list everything, this works great. Now I'm trying to make a resume, so it just shows 3 inpatients and 1 outpatients on a specific day at this place, etc. But I get an error in the title.

SELECT DISTINCT TSM950_STATION.loc_ext_id AS STATION, 
convert(varchar(10),DATEADD(DAY,-7,GETDATE()),101) AS CENSUS_DATE,
                  TSM180_CAT.cod_dtl_ds,
                  COUNT(TPM300_PAT_VISIT.vst_ext_id)
FROM         TPM300_PAT_VISIT INNER JOIN
                  TSM040_PERSON_HDR ON TPM300_PAT_VISIT.psn_int_id = TSM040_PERSON_HDR.psn_int_id INNER JOIN
                  TSM950_LOCATION_REF AS TSM950_ROOM ON TPM300_PAT_VISIT.loc_lvl_4_id = TSM950_ROOM.loc_int_id INNER JOIN
                  TSM950_LOCATION_REF AS TSM950_BED ON TPM300_PAT_VISIT.loc_lvl_5_id = TSM950_BED.loc_int_id  INNER JOIN
                  TSM950_LOCATION_REF AS TSM950_STATION ON TPM300_PAT_VISIT.loc_lvl_3_id = TSM950_STATION.loc_int_id INNER JOIN
                  TSM180_MST_COD_DTL AS TSM180_CAT ON TPM300_PAT_VISIT.pat_cat_cd = TSM180_CAT.cod_dtl_int_id
WHERE     (TSM950_STATION.loc_ext_id IN ('MS', 'OB', 'SCU', 'NURS')) AND 
        (convert(datetime,convert(varchar(10),TPM300_PAT_VISIT.adm_ts,101) +' 00:00:00'))<=convert(datetime,convert(varchar(10),DATEADD(DAY,-7,GETDATE()),101) +' 23:58:00') AND
        (convert(datetime,convert(varchar(10),TPM300_PAT_VISIT.dschrg_ts,101) +' 00:00:00'))>=convert(datetime,convert(varchar(10),DATEADD(DAY,-7,GETDATE()),101) +' 23:59:00')
GROUP BY        TSM950_STATION.loc_ext_id, 
                 convert(varchar(10),DATEADD(DAY,-7,GETDATE()),101),
                  TSM180_CAT.cod_dtl_ds
+3
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, :

convert(varchar(10),DATEADD(DAY,-7,GETDATE()),101),

, :

GROUP BY TSM950_STATION.loc_ext_id, TSM180_CAT.cod_dtl_ds
+6

DISTINCT GROUP BY . , ...

, GROUP BY .

...

SELECT    TSM950_STATION.loc_ext_id AS STATION,
          convert(varchar(10),DATEADD(DAY,-7,GETDATE()),101) AS CENSUS_DATE,
          TSM180_CAT.cod_dtl_ds,
          COUNT(TPM300_PAT_VISIT.vst_ext_id)
FROM      TPM300_PAT_VISIT INNER JOIN
          TSM040_PERSON_HDR ON TPM300_PAT_VISIT.psn_int_id = TSM040_PERSON_HDR.psn_int_id INNER JOIN
          TSM950_LOCATION_REF AS TSM950_ROOM ON TPM300_PAT_VISIT.loc_lvl_4_id = TSM950_ROOM.loc_int_id INNER JOIN
          TSM950_LOCATION_REF AS TSM950_BED ON TPM300_PAT_VISIT.loc_lvl_5_id = TSM950_BED.loc_int_id  INNER JOIN
          TSM950_LOCATION_REF AS TSM950_STATION ON TPM300_PAT_VISIT.loc_lvl_3_id = TSM950_STATION.loc_int_id INNER JOIN
          TSM180_MST_COD_DTL AS TSM180_CAT ON TPM300_PAT_VISIT.pat_cat_cd = TSM180_CAT.cod_dtl_int_id
WHERE         (TSM950_STATION.loc_ext_id IN ('MS', 'OB', 'SCU', 'NURS'))
          AND (convert(datetime,convert(varchar(10),TPM300_PAT_VISIT.adm_ts,101) +' 00:00:00'))<=convert(datetime,convert(varchar(10),DATEADD(DAY,-7,GETDATE()),101) +' 23:58:00')
          AND (convert(datetime,convert(varchar(10),TPM300_PAT_VISIT.dschrg_ts,101) +' 00:00:00'))>=convert(datetime,convert(varchar(10),DATEADD(DAY,-7,GETDATE()),101) +' 23:59:00')
GROUP BY  TSM950_STATION.loc_ext_id, 
          TSM180_CAT.cod_dtl_ds
+2

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