不具合のため、一時的に停止しました

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不具合の内容: SQLSTATE[22007]: Invalid datetime format: 7 ERROR: invalid input syntax for type timestamp: "" LINE 1: ...site=306) AND (date<=CURRENT_TIMESTAMP) AND (date>'') ORDER ... ^
不具合の原因となった命令: SELECT "photo"."id", "photo"."state", "photo"."owner", "photo"."title", "photo"."category", "photo"."date", "photo"."width", "photo"."height", to_char(date,'YYYY/FMMM/FMDD HH24:MI') AS "stamp" FROM "photo" WHERE (state!=0) AND (site=306) AND (date<=CURRENT_TIMESTAMP) AND (date>'') ORDER BY "date" ASC LIMIT 1